AIS by iasiatube





                                                                           January, 2006


        Aeronautical information/data plays a vital role in the safety, regularity and
efficiency of international air navigation. Aeronautical data has become more significant
with the implementation of area navigation (RNAV), required navigation performance
(RNP) and sophisticated computer based air navigation systems, such as Flight
Management System (FMS).

        Aeronautical information/data is provided by Aeronautical Information Services
Department of Airports Authority of India, through Integrated Aeronautical Information
Package consisting of Aeronautical Information Publication (AIP), AIP Amendments,
AIP Supplements, NOTAM and Pre-flight Information Bulletins (PIB) while
Aeronautical Information Circulars (AIC) are published and distributed by Directorate
General of Civil Aviation (DGCA). The Integrated Aeronautical Information Package
constitutes fundamental tool for Aviation Industry as the data so published is utilized by
Airlines, General Aircraft Operators, ATS Personnel, Aviation Service Providers, etc.

      This manual provides information, guidance and procedures for the provision of
Aeronautical Information Services in conformity with ICAO Annex and Docs relevant to
AIS. The parameters of Aeronautical Information Services in India harmonize with the
promulgated standards and recommended practices/procedures of ICAO.

        I am sure that this manual will prove useful for all AAI personnel engaged in the
provision of Aeronautical Information Services at the AIS sections of the CHQ and field

                                                                 ( K. RAMALINGAM )
                                                                             January, 2006


       Pursuant to the provision of article 37 of the Convention on International Civil
Aviation (Chicago 1944), each contracting state is committed to provide Aeronautical
Information Service. India being a Contracting State of ICAO, provides Aeronautical
Information Service (AIS). The AIS was initially provided by Directorate General of
Civil Aviation, India. Since 1995, DGCA and Airports Authority of India are providing
Aeronautical Information Service in respect of entire territory of India as well as areas in
which India is responsible for Air Traffic Services outside its territory.

       AIS is provided by AAI and DGCA through publication of Integrated
Aeronautical Information Package, wherein Aeronautical Information Publication (AIP),
AIP Supplement, AIP Amendment and NOTAMs are published by AAI and Aeronautical
Information Circulars (AICs) are issued by DGCA.

        The aeronautical data, so published, is immensely utilized by Aviation Services
Providers as the aeronautical data has grown sensitive and earned more significant
importance with technological developments with regard to sophisticated computer based
air navigation systems, such as Flight Management System (FMS).

       The provision of Aeronautical Information Services in India is in conformity with
the promulgated standards and recommended practices of ICAO. This manual provides
guidance for the provision of Aeronautical Information Services in line with the
provisions of ICAO Annex and Docs relevant to AIS.

       I am sure that all the users of this manual including AAI personnel engaged in the
provision of Aeronautical Information Services will be benefited.

                                                                               ( P. SETH )
 Airports Authority of India                      Manual of Aeronautical information services

                               RECORD OF AMENDMENTS

         No.                   Date applicable   Date entered               Entered by

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                                   TABLE OF CONTENTS


Record of Amendments ---------------------------------------------------------------------------- 0-1
Table of Contents------------------------------------------------------------------------------------ 0-2

CHAPTER 1 INTRODUCTION----------------------------------------------------------------- 1-1

CHAPTER 2 DEFINITIONS--------------------------------------------------------------------- 2-1

CHAPTER 3 GENERAL-------------------------------------------------------------------------- 3-1
3.1 Responsibility and functions---------------------------------------------------------------- 3-1
3.2 Quality System------------------------------------------------------------------------------- 3-1
3.3 Exchange of aeronautical information/data----------------------------------------------- 3-3
3.4 Copyright-------------------------------------------------------------------------------------- 3-3
3.5 Cost recovery--------------------------------------------------------------------------------- 3-3
3.6 General specifications----------------------------------------------------------------------- 3-3
3.7 Common reference system for air navigation-------------------------------------------- 3-4
    Appendix A – Aeronautical Data Quality Requirements------------------------------ 3-5

CHAPTER 4 Aeronautical Information Publication (AIP)
4.1 Introduction----------------------------------------------------------------------------------- 4-1
4.2 Contents--------------------------------------------------------------------------------------- 4-1
4.3 General specifications of AIP--------------------------------------------------------------- 4-21
4.4 Specifications for AIP Amendments------------------------------------------------------ 4-21
4.5 Specifications for AIP Supplements------------------------------------------------------ 4-21
4.6 Distribution----------------------------------------------------------------------------------- 4-22

5.1 Origination------------------------------------------------------------------------------------ 5-1
5.2 General specifications----------------------------------------------------------------------- 5-3
    NOTAM Format------------------------------------------------------------------------------ 5-6
5.3 Instructions for completion of NOTAM Format----------------------------------------- 5-7
5.4 The NOTAM Code and Abbreviations---------------------------------------------------- 5-10
5.5 Trigger NOTAM------------------------------------------------------------------------------ 5-22
    SNOWTAM Format-------------------------------------------------------------------------- 5-25
5.6 Instructions for completion of SNOWTAM Format-------------------------------------5-26
    ASHTAM Format---------------------------------------------------------------------------- 5-29
5.7 Instructions for completion of ASHTAM Format----------------------------------------5-30
5.8 Distribution----------------------------------------------------------------------------------- 5-33
    Annexure A – (List of NOF Centres with whom NOTAM is exchanged)----------- 5-34

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CHAPTER 6 Aeronautical Information Regulation and Control (AIRAC)
6.1 The need for control------------------------------------------------------------------------- 6-1
6.2 Regulated system---------------------------------------------------------------------------- 6-1
6.3 Information to be notified by AIRAC----------------------------------------------------- 6-1
6.4 Schedule of AIRAC effective dates------------------------------------------------------- 6-2
6.5 Significant Dates----------------------------------------------------------------------------- 6-2
6.6 Use of AIRAC system during holiday periods------------------------------------------- 6-3
6.7 Provision of information in paper copy form--------------------------------------------- 6-3
6.8 Provision of information in electronic form---------------------------------------------- 6-3

CHAPTER 7 Aeronautical Information Circulars (AIC)
7.1 Origination------------------------------------------------------------------------------------ 7-1
7.2 General specifications----------------------------------------------------------------------- 7-2
7.3 Distributions---------------------------------------------------------------------------------- 7-3

CHAPTER 8 Pre-flight and post-flight information/Data
8.1 Pre-flight information-----------------------------------------------------------------------     8-1
8.2 Bulletin format-------------------------------------------------------------------------------    8-1
8.3 Automated aeronautical information systems--------------------------------------------            8-2
8.4 Post-flight information----------------------------------------------------------------------     8-2

CHAPTER 9 Telecommunication Requirements-------------------------------------------- 9-1

CHAPTER 10 Electronic Terrain and Obstacle Data

10.1    Function--------------------------------------------------------------------------------------- 10-1
10.2    Coverage and terrain and obstacle data numerical requirements---------------------- 10-1
10.3    Terrain database – Content and Structure------------------------------------------------- 10-2
10.4    Obstacle database – Content and Structure----------------------------------------------- 10-2
10.5    Terrain and obstacle data product specifications---------------------------------------- 10-3
10.6    Availability----------------------------------------------------------------------------------- 10-4
        Appendix B – Terrain and obstacle Data Requirements------------------------------- 10-5

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                                             CHAPTER 1.


1).        The provision of aeronautical information is essential for the safety, regularity and efficiency
           of air navigation. The role of aeronautical information/ data has become all the more
           significant with the implementation of area navigation (RNAV), Required Navigation
           Performance (RNP) and Airborne Computer based Navigation Systems such as Flight
           Management System (FMS). Any error in the aeronautical information/ data can affect the
           safety of air navigation.

2).        Aeronautical information service is provided by Airports Authority of India for the whole of
           Indian territory and adjoining oceanic airspace over Bay of Bengal, Indian Ocean and Arabian
           Sea allocated to India by ICAO for the provision of Air Traffic Services.

3).        This manual documents information pertaining to the rules, regulation, procedures and
           instructions to be followed for the provision of Aeronautical Information Services by Officers
           & Staff working in the AIS Section of CHQ, New Delhi, International NOTAM Offices
           (NOF) located at Delhi, Kolkata, Mumbai & Chennai and AIS Section at other airports. AIS
           functions are performed by ATS/CNS personnel where the dedicated AIS staff is not posted

4).        Differences from ICAO Standards & Recommended practices of ICAO Annex 15 are
           published in AIP India.

5)         This manual shall not be reproduced or copied in part or full in anyway by any other
           organization except AAI.

6).        Aeronautical Information Service is provided in conformity with the following ICAO Annex
           and documents;

           1.       Annex 15       -        Aeronautical Information Services.
           2.       DOC 8126       -        Aeronautical Information Services Manual.
           3.       DOC 8400       -        ICAO Abbreviations & Codes.
           4.       DOC 7383       -        Aeronautical Information Service providers.
           5.       DOC 7910       -        Location Indicators.

7).        This manual may be amended as and when considered appropriate. The need to amend this
           manual may arise because of the following reasons, (some of the parameters on account of
           which amendment may be considered are listed below):

           1)   Amendments to the applicable ICAO Annex and documents.
           2)   Introduction of new technologies in the provision of AIS.
           3)   Changes/ introduction of DGCA CARs.
           4)   Requirements from ATS, Airlines or any other concerned aviation agency.

8).        The manual will be amended by General Manager (AIS) under the authority of Executive
           Director (ATM) and/or Member (Operations).

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                                           CHAPTER 2.

When the following terms are used in this           AIP Supplement. Temporary changes to the
manual, they have the following meanings;           information contained in the AIP which are
                                                    published by means of special pages.
Accuracy. A degree of conformance between
the estimated or measured value and the true        AIRAC.       An      acronym     (aeronautical
value.                                              information regulation and control) signifying
                                                    a system aimed at advance notification based
       Note. – For measured positional data         on common effective dates, of circumstances
the accuracy is normally expressed in terms of      that necessitate significant changes in
a distance from a stated position within which      operating practices.
there is a defined confidence of the true
position falling.                                   Air defence identification zone (ADIZ).
                                                    Special designated airspace of defined
Aeronautical data. A representation of              dimensions within which aircraft are required
aeronautical facts, concepts or instructions in a   to comply with special identification and/or
formalized       manner        suitable       for   reporting procedures additional to those
communication, interpretation or processing.        related to the provision of air traffic services
Aeronautical      information.   Information
resulting from the assembly, analysis and           AIS product. Aeronautical information
formatting of aeronautical data.                    provided in the form of the elements of the
                                                    Integrated Aeronautical Information Package
Aeronautical Information Circular (AIC). A          (except NOTAM and PIB), including
notice containing information that does not         aeronautical charts, or in the form of suitable
qualify for the origination of a NOTAM or for       electronic media.
inclusion in the AIP, but which relates to flight
safety, air navigation, technical, administrative   Application. Manipulation and processing of
or legislative matters.                             data in support of user requirements (ISO
Aeronautical Information Publication (AIP).
A publication issued by or with the authority       ASHTAM. A special series NOTAM notifying
of a State and containing aeronautical              by means of a specific format change in
information of a lasting character essential to     activity of a volcano, a volcanic eruption
air navigation.                                     and/or volcanic ash cloud that is of
                                                    significance to aircraft operations.
Aeronautical Information Service (AIS). A
service established within the defined area of      Assemble. A process of merging data from
coverage responsible for the provision of           multiple sources into a database and
aeronautical information/data necessary for the     establishing a baseline for subsequent
safety, regularity and efficiency of air            processing.
                                                         Note. – The assemble phase includes
AIP Amendment. Permanent changes to the             checking the data and ensuring that detected
information contained in the AIP.                   errors and omissions are rectified.

                                                    * All ISO Standards are listed at the end of
                                                    this chapter.

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Bare Earth. Surface of the Earth including         Data quality. A degree or level of confidence
bodies of water and permanent ice and snow,        that the data provided meets the requirements
and excluding vegetation and man-made              of the data user in terms of accuracy,
objects.                                           resolution and integrity.

Calendar. Discrete temporal reference system       Data set. Identifiable collection of data (ISO
that provides the basis for defining temporal      19101*).
position to a resolution of one day (ISO
19108*).                                           Data set series. Collection of data sets sharing
                                                   the same product specification (ISO 19115*).
Canopy. Bare Earth             supplemented   by
vegetation height.                                 Datum. Any quantity or set of quantities that
                                                   may serve as a reference or basis for the
Culture. All man-made features constructed         calculation of other quantities (ISO 19104*).
on the surface of the Earth, such as cities,
railways and canals.                               Digital Elevation Model (DEM). The
                                                   representation of terrain surface by continuous
Cyclic redundancy check (CRC). A                   elevation values at all intersections of a
mathematical algorithm applied to the digital      defined grid, referenced to common datum.
expression of data that provides a level of
assurance against loss or alteration of data.            Note. – Digital Terrain Model (DTM) is
                                                   sometimes referred to as DEM.
Danger area. An airspace of defined
dimensions within which activities dangerous       Direct     transit   arrangements.      Special
to the flight of aircraft may exist at specified   arrangements approved by the public
times.                                             authorities concerned by which traffic which is
                                                   pausing briefly in its passage through the
Database. One or more files of data so             Contracting State may remain under their
structured that appropriate applications may       direct control.
draw from the files and update them.
                                                   Ellipsoid height (Geodetic height). The height
     Note. – This primarily refers to data         related to the reference ellipsoid, measured
stores electronically and accessed by              along the ellipsoidal outer normal through the
computer rather than in files of physical          point in question.
                                                   Feature. Abstraction of real world phenomena
Data product. Data set or data set series that     (ISO 19101*).
conforms to a data product specification (ISO
19131*).                                           Feature attribute. Characteristic of a feature
                                                   (ISO 19101*).
Data product specification. Detailed
description of a data set or data set series             Note. – A feature attribute has a name, a
together with additional information that will     data type and a value domain associated with
enable it to be created, supplied to and used by   it.
another party (ISO 19131*).
                                                   Feature operation. Operation that every
      Note. – A data product specification         instance of a feature type may perform (ISO
provides a description of the universe of          19110*).
discourse and a specification for mapping the
universe of discourse to a data set. It may be
used for production, sales, end-use or other       * All ISO Standards are listed at the end of
purpose.                                           this chapter.

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     Note. – An operation upon the feature         Height. The vertical distance of a level, point
type dam is to raise the dam. The result of this   or an object considered as point, measured
operation is to raise the level of water in the    from a specific datum.
                                                   Heliport. An aerodrome or a defined area on a
Feature relationship. Relationship that links
                                                   structure intended to be used wholly or in part
instances of one feature type with instances of
                                                   for the arrival, departure and surface
the same or a different feature type (ISO
                                                   movement of helicopter.
                                                   Human Factors principles. Principles which
Feature type. Class of real world phenomena
                                                   apply to aeronautical design, certification,
with common properties (ISO 19110*).
                                                   training, operations and maintenance and
                                                   which seek safe interface between the human
     Note. – In a feature catalogue, the basic
                                                   and other system components by proper
level of classification is the feature type.
                                                   consideration to human performance.
Geodesic distance. The shortest distance
                                                   Integrated     Aeronautical Information
between any two points on a mathematically
                                                   Package. A package which consists of the
defined ellipsoidal surface.
                                                   following elements:
Geodetic datum. A minimum set of
                                                       -   AIP, including amendment service;
parameters required to define location and
                                                       -   Supplements to the AIP;
orientation of the local reference system with
                                                       -   NOTAM and PIB;
respect to the global reference system/frame.
                                                       -   AIC; and
                                                       -   Checklists and lists of valid NOTAM.
Geoid. The equipotential surface in the gravity
field of the Earth which coincides with the
                                                   Integrity (aeronautical data). A degree of
undisturbed mean sea level (MSL) extended
                                                   assurance that an aeronautical data and its
continuously through the continents.
                                                   value has not been lost or altered since the data
      Note. – The geoid is irregular in shape
                                                   origination or authorized amendment.
because of local gravitational disturbances
                                                   International airport. Any airport designated
(wind tides, salinity, current, etc.) and the
                                                   by the Contracting State in whose territory it is
direction of gravity is perpendicular to the
                                                   situated as an airport of entry and departure for
geoid at every point.
                                                   international air traffic, where the formalities
                                                   incident to customs, immigration, public
Geoid undulation. The distance of the geoid
                                                   health, animal and plant quarantine and similar
above (positive) or below (negative) the
                                                   procedures are carried out.
mathematical reference ellipsoid.
                                                   International NOTAM office (NOF). An
     Note. – In respect to the World Geodetic
                                                   office designated by a State for the exchange
System – 1984 (WGS-84) defined ellipsoid, the
                                                   of NOTAM internationally.
difference between the WGS-84 ellipsoidal
height and orthometric height represents
                                                   Manoeuvring area. That part of an aerodrome
WGS-84 geoid undulation.
                                                   to be used for the take-off, landing and taxiing
                                                   of aircraft, excluding aprons.
Gregorian calendar. Calendar in general use;
first introduced in 1582 to define a year that
                                                   Metadata. Data about data (ISO 19115*).
more closely approximates the tropical year
than the Julian calendar (ISO 19108*).
                                                       Note. – Data         that   describes    and
                                                   documents data.
   Note. – In the Gregorian calendar,
common years have 365 days and leap year
366 days divided into twelve sequential            * All ISO Standards are listed at the end of
months.                                            this chapter.

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Movement area. That part of an aerodrome to        Prohibited area. An airspace of defined
be used for the take-off, landing and taxiing of   dimensions, above the land areas or territorial
aircraft, consisting of the manoeuvring area       waters of a State, within which the flight of
and the apron(s).                                  aircraft is prohibited.

NOTAM. A notice distributed by means of            Quality. Totality of characteristics of an entity
telecommunication containing information           that bear on its ability to satisfy stated and
concerning the establishment, condition or         implied needs (ISO 8402*).
change in any aeronautical facility, service,            Note. – Entity is an item which can be
procedure or hazard, the timely knowledge of       individually described and considered (ISO
which is essential to personnel concerned with     8402*).
flight operations.
                                                   Quality assurance. All the planned and
Obstacle. All fixed (whether temporary or          systematic activities implemented within the
permanent) and mobile objects, or parts            quality system, and demonstrated as needed, to
thereof, that are located on an area intended      provide adequate confidence that an entity will
for the surface movement of aircraft or that       fulfill requirements for quality (ISO 8402*).
extend above a defined surface intended to
protect aircraft in flight.                        Quality Control. The operational techniques
                                                   and activities that are used to fulfill
Obstacle/ terrain data collection surface. A       requirements for quality (ISO 8402*).
defined surface intended for the purpose of
collecting obstacle/terrain data.                  Quality management. All activities of the
                                                   overall management function that determine
Orthometric height. Height of a point related      the    quality    policy,  objectives  and
to the geoid, generally presented as an MSL        responsibilities and implementing them by
elevation.                                         means such as quality planning, quality
                                                   control, quality assurance and quality
Portrayal. Presentation of information to          improvement within the quality system (ISO
humans (ISO 19117*).                               8402*).

Position (Geographical). Set of coordinates        Quality system. The organizational structure,
(latitude and longitude) referenced to the         procedures, processes and resources needed to
mathematical reference ellipsoid which define      implement quality management (ISO 8402*).
the position of a point on the surface of the
Earth.                                             Relief. The inequalities in elevation of the
                                                   surface of the Earth represented on
Post spacing. Angular or linear distance           aeronautical charts by contours, hypsometric
between two adjacent elevation points.             tints, shading or spot elevations.
                                                   Requirements for quality. Expression of the
Precision. The smallest difference that can be     needs or their translation into a set of
reliably distinguished by a measurement            quantitatively     or     qualitatively    stated
process.                                           requirements for the characteristics of an entity
                                                   to enable its realization and examination (ISO
 Note. – In reference to geodetic surveys,         8402*).
precision is a degree of refinement in
performance of an operation or a degree of         Resolution. A number of units or digits to
perfection in the instruments and methods          which a measured or calculated value is
used when taking measurements.                     expressed and used.

Pre-flight information bulletin (PIB). A
presentation of current NOTAM information          * All ISO Standards are listed at the end of
of operational significance, prepared prior to     this chapter.

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Restricted area. An airspace of defined             Traceability. Ability to trace the history,
dimensions, above the land areas or territorial     application or location of an entity by means
waters of a State, within which the flight of       of recorded identifications (ISO 8402*).
aircraft is restricted in accordance with certain
specified conditions.                               Validation. Confirmation by examination and
                                                    provision of objective evidence that the
Route stage. A route or portion of a route          particular requirements for a specific intended
flown without an intermediate landing.              use are fulfilled (ISO 8402*).

SNOWTAM. A special series NOTAM                     Verification. Confirmation by examination
notifying the presence or removal of                and provision of objective evidence that
hazardous conditions due to snow, ice, slush or     specified requirements have been fulfilled
standing water associated with snow, slush and      (ISO 8402*).
ice on the movement area, by means of a
specific format.                                          Note. – Objective evidence is
                                                    information which can be proved true, based
Station declination. An alignment variation         on facts obtained through observation,
between the zero degree radial of a VOR and         measurement, test or other means (ISO
true north, determined at the time the VOR          8402*).
station is calibrated.
Terrain. The surface of the Earth containing
naturally occurring features such as                * ISO Standard
mountains, hills, ridges, valleys, bodies of           8402 -- Quality Management and Quality
water, permanent ice and snow, and excluding                   Assurance – Vocabulary, Second
obstacles.                                                     Edition
                                                      19101 -- Geographic information – Reference
       Note.- In practical terms, depending on
                                                      19104 -- Geographic         information     –
the method of data collection used, terrain                    Terminology
represents the continuous surface that exists at      19108 -- Geographic information – Temporal
the bare Earth, the top of the canopy or                       schema
something in-between, also known as “first            19109 -- Geographic information – Rules for
reflective surface”.                                           application schema
                                                      19110 -- Geographic information – Feature
                                                               cataloguing schema
                                                      19115 -- Geographic information – Metadata
                                                      19117 -- Geographic information – Portrayal
                                                      19131 -- Geographic information – Data
                                                               product specification

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                                          CHAPTER 3.

   3.1 Responsibilities and functions              possible, be verified before distribution (such
                                                   as VOR not holding) and if not verified shall
3.1.1 In India Aeronautical information            be clearly identified (such as birds/wind shear
service is provided by Airports Authority of       reported by (flight No.) at (time).
India, except Aeronautical Information
Circular (AIC), which is issued by DGCA.           3.1.4 Aeronautical             information/data
Provision of Standard and Recommended              necessary for the safety, regularity and
Practices of Annex-15 are adequately               efficiency of air navigation, is made available
complied.                                          promptly to aeronautical information services
                                                   of other States via AFTN .     Aeronautical information/data is
provided for the entire Indian Territory as well   3.1.5 Aeronautical      information/data is
as oceanic areas over Bay of Bengal, Indian        distributed in standard formats for the
Ocean and Arabian Sea, for which                   operational requirements of:
responsibility for providing Air Traffic Service
has been accorded by ICAO. The aeronautical          a) those involved in flight operations,
information/data is adequate, of required               including flight crews, flight planning
quality and timely. Adequate arrangements               and flight simulators; and
exist for timely provision of required
information/data to/from AIS Section among           b) the air traffic services unit responsible
States’ associated with provisions of AIS.              for flight information service and the
                                                        services responsible for pre-flight The service is provided for 24-hour.           information.

3.1.2 Aeronautical information is obtained         3.1.6 AIS Section of CHQ, RG Bhavan,
from the following sources for the provision of    New Delhi and NOF Centres located at
pre-flight    information     and      in-flight   Chennai, Delhi, Kolkata and Mumbai are
information:                                       responsible to receive/originate, collate or
                                                   assemble, edit, format, publish/store and
 a) from relevant elements of the Integrated       distribute   aeronautical     information/data
Aeronautical Information Package;                  concerning the entire Indian Territory as well
                                                   as oceanic airspace defined above in Para
  b)     from the aeronautical information Aeronautical information is published
services of other States;                          as an Integrated Aeronautical Information
                                                   Package except Aeronautical Information
  c)    from other sources (such as                Circulars (AICs), which are published and
observations made by Air Crew) that may be         promulgated by DGCA.
available for in-flight information.
                                                                3.2 Quality System
        Other documents such as AIP India,
AIC, AIP supplements and charts are also           3.2.1 AAI has initiated action to introduce a
available for pre-flight briefing.                 properly organized quality system containing
                                                   procedures, processes and resources necessary
3.1.3 Aeronautical         information/data        to implement quality management at each
obtained under 3.1.2 (c) above shall, if           functional stage as outlined in Para 3.1.6

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3.2.2 The quality system established in            from survey/origin to distribution to the next
accordance with Para 3.2.1 shall be in             intended user. Corruption of aeronautical data
conformity with the ISO 9000 series of quality     integrity can lead to jeopardizing the safety of
assurance standards and duly certified by an       the aircraft operations. It is, therefore, essential
approved organization.                             that the following data integrity levels are
3.2.3 It has to be ensured that personnel
assigned to enforce the quality system shall       a)          Critical data integrity level 1 x 10-8
possess the skills and knowledge required for                  should be met for the following:-
each function. The personnel engaged for the            i)         Runway threshold, runway end
quality system shall undergo an appropriately                      and runway holding position
designed training programme to acquire the                         coordinates.
skills and competencies required to perform             ii)        Threshold crossing height and
specific assigned functions. A system of initial                   precision approaches.
and periodic assessments shall be established           iii)       Landing distance available.
and appropriate records shall be maintained, so         iv)        Take-off run available.
that the qualifications of the persons can be           v)         Take-off distance available and
confirmed. Periodic assessments of personnel                       accelerate stop distance available.
shall be used as a means to detect and correct
shortcomings, if any.                                  Details of essential data integrity level and
                                                   routine data integrity level are contained in
3.2.4 The objective of the quality system is       Appendix A.
to ensure and build-up the confidence that
distributed   aeronautical      information/data   3.2.8 Protection of Electronic Aeronautical
meets the requirements for accuracy,               Data while stored or in transit, shall be totally
resolution and integrity of the data.              monitored by the Cyclic Redundancy Check
                                                   (CRC). To achieve protection of the integrity
3.2.5 Proper record of all data received for       level of critical and essential aeronautical data,
publication and distribution shall be              a 32 or 24 bit CRC algorithm shall be applied.
maintained so that the aeronautical data can be
traced to its origin to correct any data           3.2.9 Materials to be issued as part of the
anomalies or errors detected during the            Integrated Aeronautical Information package,
maintenance/ production phases or while in         shall be thoroughly checked and coordinated
operational use.                                   by the originator before it is submitted to the
                                                   AIS Section, in order to ensure that all
3.2.6 The order of accuracy for aeronautical       necessary information has been included and it
data, based upon a 95% confidence level meets      is correct in detail prior to distribution. A
the requirement as specified in Appendix-A.        validation and verification procedure shall be
In that respect, three types of positional data    established which will ensure that correct
have been identified; surveyed points (runway      requirements (accuracy, resolution, integrity)
thresholds, navigation aid positions, etc.),       and traceability of aeronautical data are met.
calculated points (mathematical calculations
from the known surveyed points of points in        3.2.10 The compliance with the quality
space/fixes) and declared points (flight           system shall be demonstrated by an audit. If
information region boundary points). At the        any non-conformity is identified, action shall
moment, the data is maintained manually and        be initiated to determine its cause and correct
its accuracy is maintained by checking and         it. All such non-conformities observed during
cross-checking the data frequently.                audit and the remedial actions taken shall be
3.2.7 High integrity of aeronautical data is
to be maintained throughout the data process

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3.3.    Exchange     of      Aeronautical         not ICAO Contracting States or with other
        Information and data                      entities.

3.3.1 AAI has designated the four                 3.4        Copyright
International NOTM Offices (NOF) located at
Chennai, Delhi, Kolkata and Mumbai, to            AIP India is copyright protected document.
receive all elements of the integrated
aeronautical information package originated       3.5        Cost Recovery
by designated States. These NOF centers will
also be responsible to deal with the requests     AIP India is a priced publication, its cost of
for information/ data from other States.          printing and production is only charged on a
                                                  cost-recovery basis.
3.3.2 AAI has established four international
NOTAM offices (NOF) located at Chennai,           3.6.       General Specifications
Delhi, Kolkata and Mumbai. Each NOF is
responsible for issue/cancellation of NOTAM       3.6.1 All elements of integrated aeronautical
for all the aerodromes located in the FIR, in     information package and place names are
which it is located. Additionally, each NOF       published by AAI in English language.
exchanges A-Series NOTAM with a number
of international NOTAM offices. The               3.6.2 Units of Measurement used in the
international NOTAM offices, with which           distribution of aeronautical information/data
each Indian NOF exchanges NOTAM, are              conform to the tables contained in AIP India
defined and listed at the end of Chapter 5 –      GEN.2.1.
(NOTAM) as Annexure A. However, B-series
NOTAM are exchanged with adjacent FIR             3.6.3      Use of ICAO abbreviations
                                                  ICAO abbreviations contained in Doc 8400
3.3.3 Adequate arrangements have been             shall be used for publishing and distribution of
made to satisfy operational requirements for      aeronautical information/data.
the issuance and receipt of NOTAM, by
connecting all NOF centers and AIS Section of     3.6.4      Use of automation
AAI, CHQ with Aeronautical Fixed
Telecommunication Network (AFTN).                 To improve the speed, accuracy, efficiency
                                                  and cost effectiveness of the aeronautical
3.3.4 One copy of each of the elements of         information services provided by AAI, all
the integrated aeronautical information           aeronautical information/data for AIP, AIP
package, in printed form, is made available by    Amendment, AIP Supplements and NOTAMs
AAI to other ICAO Contracting States from         are stored in Desktop computers. It is further
whom the same is received without charge.         proposed to introduce full automation in AIS
                                                  as early as possible.
3.3.5 At present, there is no written bilateral
agreement to exchange (more than one copy         3.6.5      Identification and delineation of
of) the elements of the integrated aeronautical              Prohibited, Restricted and Danger
information package or other air navigation                  Areas
documents with other ICAO Contracting
States.                                      Each Prohibited area, Restricted
                                                  area or Danger area established in India, has
3.3.6 At present, there is no written             been given an identification and full details
agreement for the procurement of integrated       have been promulgated in Section ENR 5.1 of
aeronautical information package or other air     AIP India.
navigation documents with States which are

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__________________________________________________________________________________________ The identification assigned to each                To overcome such human errors, a
area is used to identify the area in all             system of checking, verification and
subsequent notifications pertaining to that          supervision over the entry of aeronautical
area.                                                information/data needs to be exercised at every
                                                     stage of production and distribution of the The identification assigned to each        complete integrated aeronautical information
area is composed of a group of three letters         package.
and figures, as follows:-
                                                     3.7       Common Reference System for air
    a)      The first letter “V” – the letter                  navigation
            assigned by ICAO to identify
            India (the State/region) for             3.7.1     Horizontal Reference System
            purpose of location indicator.
                                                  All aeronautical geographical
    b)      The second letter will identify any      coordinates    (indication   latitudes and
            of the four regions of India, i.e.,      longitudes) are published in World Geodetic
            A, E, I, O.                              System – 1984 (WGS-84).

    c)      The third letter will be either “P”    Geographical coordinates which
            for prohibited area, “R” for             have been transformed into WGS-84
            restricted area or “D” for danger        coordinates but whose accuracy of original
            area, as appropriate.                    fieldwork could not be validated to the order
    d)      A group of numbers (this should          of accuracy as specified in the requirements of
            not be duplicated in any other           Appendix 1 shall be identified by an asterisk.
            region in the country).
                                                     3.7.2     Vertical Reference System
            e.g. VID 109 indicates a danger
            area located in Delhi Region.        Mean sea level (MSL) datum,
                                                     which gives the relationship of gravity-related       If any identification number is      height (elevation) to a surface known as the
cancelled, it shall not be re-used for a period of   geoid, shall be used as the vertical reference
at least one year to avoid confusion.                system in India.

3.6.6    Human Factors Considerations             The Earth Gravitational Model –
                                                     1996 (EGM-96), containing long wavelength
        Some human errors of general nature          gravity field data to degree and order 360 is
can be predicted in advance. The human –             used in India.
machine interface mainly consists of human
(liveware) – software and human (liveware) –        Geoid undulation is not yet
hardware links. Most of the aeronautical             published in India.
information/data is conveyed from the human
to the machine by means of input devices such        3.7.3     Temporal Reference System
as keyboard and mouse. Human error is
possible while entering any given aeronautical Gregorian calendar and coordinated
information/data into the system. Visual error       Universal Time (UTC) are used as the
or misreadings can be caused by alpha                Temporal Reference System for all AIS
numeric characters or coordinates which look         publications.
similar to each other, lines of data which can
be mistaken for each other, blocks of data
which look alike.

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                                Table A-1. Latitude and Longitude


 Note. See Appendix B of Chapter 10 for graphical illustrations of obstacle data, collection surfaces
and criteria used to identified obstacles in the defined areas.

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                                                                                        Appendix A

                               Table A-2. Elevation/ altitude/ height

Note. See Appendix B of Chapter 10 for graphical illustrations of obstacle data, collection surfaces
and criteria used to identified obstacles in the defined areas.

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                                                                                    Appendix A

                         Table A-3. Declination and magnetic variation


                                      Table A-4. Bearing


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                                                                                        Appendix A

                               Table A-5. Length/ distance/ dimension


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                                         CHAPTER 4.


         4.1 INTRODUCTION                            GEN 0.2 Record of AIP Amendments

4.1.1 AIP is intended to satisfy International    A table to keep a record of AIP Amendments
requirements for the exchange of aeronautical     is included here with the following columns:
information of a lasting character essential to
air navigation. AIP constitutes the basic         1) amendment number;
information source for permanent information
and long duration temporary changes.              2) publication date;

4.1.2 AIP India has been published                3) date inserted; and
according to ICAO standards contained in
Annex 15 and guidelines contained in ICAO         4) initials of officer who inserted the
Doc 8126 – Aeronautical Information Services         amendment.
                                                  ● Specifications on AIP amendments are
             4.2 CONTENTS                         detailed in Para 4.4 and 4.6.

4.2.1 AIP India has been published in two            GEN 0.3 Record of AIP Supplements
volumes. Volume I contains Part 1 – General
(Gen) and Part 2 – En-route (ENR). Volume II      A table to keep a record of issued AIP
contains Part 3 – Aerodromes (AD).                Supplements is included in this subsection
                                                  with the following columns:
4.2.2 The contents of each part are detailed
as follows:-                                      1) Supplement number/Year of issue;

        Part 1 – GENERAL (GEN)                    2) Supplement subject;

        GEN 0.1 Preface                           3) AIP section(s) affected;

Brief description of the Aeronautical             4) period of validity; and
Information Publication (AIP) has been
published in this subsection including:           5) cancellation record.

1) name of the publishing authority;              ● Specifications on AIP supplements are cited
                                                  in Para 4.5 and 4.6.
2) applicable ICAO documents;
                                                        GEN 0.4 Checklist of AIP pages
3) the AIP structure and established regular
   amendment interval; and                        A complete checklist of AIP pages has been
                                                  published in this subsection, containing:
4) service to contact in case of detected AIP
   errors or omissions                            1) page number/chart title; and

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2) publication or effective date (day, month      6) telex number; and
   by name and year) of the aeronautical
   information.                                   7) aeronautical fixed servidce (AFS) address.

This checklist is amended/ updated every time       GEN 1.2 Entry, transit and departure
when an AIP amendment is issued.                            of aircraft.

    GEN 0.5 List of hand amendments               The applicable regulations and requirements
            to the AIP                            for advance notification and applications for
                                                  permission concerning entry, transit and
A table is provided to keep a list of current     departure of aircraft on scheduled and non-
hand amendments to the AIP containing the         scheduled international flights pertaining to
following columns:                                India are published in this subsection.

1) AIP page(s) affected;                            GEN 1.3 Entry, transit and departure
                                                            of passengers and crew
2) amendment text; and
                                                  The applicable regulations for customs,
3) AIP Amendment number by which a hand           immigration, public health and quarantine
   amendment was introduced.                      pertaining to India are published in this
                                                  subsection. Requirements for advance
   GEN 0.6 Table of contents to Part 1            notification and applications concerning entry,
                                                  transit and departure of non-immigrant
A list of sections and subsections contained in   passengers and crew are also included.
Part 1 – General (GEN) is published under this
heading.                                            GEN 1.4 Entry, transit and departure
                                                            of cargo
         AND REQUIREMENTS                         Customs requirement for entry, transit and
                                                  departure of cargo are published in this
      GEN 1.1 Designated authorities              subsection.

The addresses of designated authorities in        GEN 1.5 Aircraft instruments, equipment
India concerned with the facilitation of                  and flight documents.
international air navigation such as civil
aviation, meteorology, customs, immigration,          1) A brief description of aircraft
health, en-route and aerodrome charges,                  instruments,     communication       &
agricultural quarantine and aircraft accident            navigation equipments and flight
investigation are published in this subsection.          documents, to be carried by aircraft in
Following details for each authority are                 India are published in this subsection,
included:                                                including special requirements, e.g.
                                                         Carriage of Airborne Collision
1) designated authority;                                 Avoidance System (ACAS), as laid-
                                                         down in DGCA’s Civil Aviation
2) name of the authority;                                Requirements (CAR) Section 2 –
                                                         Airworthiness, Series “I”.
3) postal address;
                                                      2) All aeroplanes shall be equipped with
4) telephone number;                                     Emergency      Locator    Transmitter
                                                         (ELT), signaling devices and life
5) telefax number;                                       saving equipment (including means of

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        sustaining life) as laid-down in   In the Gregorian calendar, which is
        DGCA’s CAR Section 2, Series “I”,           in general use, common years have 365 days
        Part II – Aircraft Equipments and           and leap years 366 days divided into 12
        Instruments,    for    flights over         sequential months.
        designated land areas.
                                                       GEN 2.1.3 Horizontal reference system
GEN 1.6 Summary of national regulations
        and international agreements/      World geodetic system – 1984 (WSG-
        conventions                                 84) is used as the horizontal (geodetic)
                                                    reference system for publication of all
This subsection contains a list of titles and       aeronautical information/data by AAI.
references and, where applicable, brief             Consequently, all published geographical
summaries of national regulations affecting air     coordinates (indicating latitude and longitude)
navigation, together with a list of international   are expressed in terms of the WGS-84
agreements/conventions ratified by India.           geodetic reference datum.

     GEN 1.7 Differences from ICAO                      GEN 2.1.4 Vertical reference system
             Standards, Recommended
             Practices and Procedures      The Earth Gravitational model – 1996
                                                    (EGM-96), containing long wavelength
A list of significant differences between           gravity field data to degree and order 360, is
national regulations and practices followed in      used by AAI as the global gravity model.
India and related ICAO provisions are
contained in this subsection, including:      Geoid undulation has not been
                                                    published so far.
1) Provision affected (Annex and edition
   number, paragraph); and
                                                         GEN 2.1.5 Aircraft nationality and
2) Difference in full text.                                        registration marks

All significant differences are listed under this   Indication of aircraft nationality and
subsection.                                         registration marks adopted by India have been
                                                    published in this subsection.
                                                             GEN 2.1.6 Public holidays
   GEN 2.1 Measuring system, aircraft
           markings, holidays              There are three national public
                                                    holidays which are fixed & observed on the
      GEN 2.1.1 Units of measurement                same dates every years. These are published
                                                    on page 2.1-2 of AIP India.
A description of units of measurement used,
including table of units of measurement has There are another 14 public holidays,
been published in this subsection.                  dates of which vary every year. The list of
                                                    these holidays are published as an AIP
   GEN 2.1.2 Temporal reference system              Supplement in January every year. The Gregorian calendar and         Postal and banking facilities are not
coordinated universal time (UTC) is used as         available on public holidays, except for limited
the temporal reference system in all AIS            hours at designated branches.
publications of AAI.

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    GEN 2.2 Abbreviations used in AIS              2) feet and metres and vice versa;
                                                   3) decimal minutes of arc and seconds of arc
A list of alphabetically arranged abbreviations       and vice versa
and their respective significations used by
India in its AIP and in the distribution of                    are given in this subsection.
aeronautical information/data have been
published in this subsection, with appropriate            GEN 2.7 Sunrise/sunset tables
annotation for those national abbreviations that
are different from those contained in the          Brief description of criteria used for
Procedures for air Navigation Services –           determination of the times given in the
ICAO Abbreviations and Codes (PANS-ABC,            sunrise/sunset tables are given in this
Doc 8400).                                         subsection. An alphabetical list of 55 selected
                                                   stations/locations for which sunrise/sunset
        2.3 Chart symbols                          tables are given is included in the subsection.
                                                   Following details for each station/location, for
A list of chart symbols arranged according to      which sunrise/sunset time are given, are
the chart series where symbols are applied has     included:
been published in this subsection.
                                                   1) station name
       GEN 2.4 Location Indicators
                                                   2) ICAO location indicator;
A list of alphabetically arranged location
indicators assigned to the locations of            3) geographical coordinates in degrees and
aeronautical fixed stations in India to be used       minutes;
for encoding and decoding purposes has been
published in this subsection. An asterisk mark     4) date(s) for which times are given;
is placed at locations not connected to the        5) time for the beginning of morning civil
Aeronautical Fixed Service (AFS).                     twilight;

   GEN 2.5 List of radio navigation aids           6) time for sunrise;

This subsection contains a list of radio           7) time for sunset; and
navigation aids arranged alphabetically,
including:                                         8) time for the end of evening civil twilight.

1) Identifier;                                                GEN 3. SERVICES

2) Name of the station;                                GEN 3.1 Aeronautical information
3) type of facility/aid; and
                                                          GEN 3.1.1 Responsible service
4) indication whether aid serves en-route (E),
   aerodrome (A) or dual (AE) purposes.            Description of the Aeronautical Information
                                                   Service (AIS) provided by AAI is included in
        GEN 2.6 Conversion tables                  this subsection. Description includes the
                                                   following details:
Tables for conversion between:
                                                   1) Location of AIS Hqrs. and four NOF
1) nautical miles and kilometers and vice             Centres & their

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2) postal address;                                 A list of of aerodromes at which pre-flight
                                                   information is routinely available is published
3) telephone number;                               in this subsection, including an indication of
4) telefax number;
                                                   1) elements of the integrated Aeronautical
5) AFS address;                                       Information Packages held;

6) e-mail address;                                 2) general area of coverage of such data.

7)    a statement concerning the ICAO              3) Automatic Self Briefing System (ASBS).
     documents on which the service is based
     and a reference to the AIP location where       GEN 3.1.6 Electronic terrain and obstacle
     differences, if any, are listed.                          data

       GEN 3.1.2 Area of responsibility   AAI proposes to provide electronic
                                                   terrain and obstacle data for various areas as
The area of responsibility for the aeronautical    laid-down in Chapter 10 of Annex 15.
information service provided by AAI is
included in this subsection.
                                                          GEN 3.2 Aeronautical charts
     GEN 3.1.3 Aeronautical publications
                                                         GEN 3.2.1 Responsible service(s)
A brief description of the elements of the
Integrated Aeronautical Information Package        AAI publishes a wide range of aeronautical
provided by AAI is published in this               charts. The charts are developed by the
subsection, which includes the following:          Cartography Section of the Directorate of Air
                                                   Traffic Management located at the Corporate
1) AIP and related amendment service;              Hqrs. at Rajiv Gandhi Bhavan, Safdarjung
                                                   Airport, New Delhi – 110003.
2) AIP Supplements;
                                                   The charts are produced in accordance with
3) AIC are issued by DGCA;                         the provisions contained in ICAO Annex 4 –
                                                   Aeronautical      Charts     and   DOC-8697.
4) NOTAM and pre-flight information                Differences, if any, from these provisions are
   bulletins (PIB).                                detailed in the AIP at Section GEN 1.7.

5) checklists and lists of valid NOTAM; and
                                                         GEN 3.3.2 Maintenance of charts
6) how they may be obtained.
                                                   The aeronautical charts are revised and
                                                   amended regularly and corrections to them are
          GEN 3.1.4 AIRAC system                   promulgated by NOTAMs, AIP Supplements
                                                   and AIP Amendments, etc.
Brief description of the AIRAC system is
provided in this subsection including a table of
present and near future AIRAC dates.                    GEN 3.2.3 Purchase arrangements

         GEN 3.1.5 Pre-flight information          The charts published by AAI are available for
           service at aerodromes                   sale at the;

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Aeronautical Information Service,                      GEN 3.2.8 Corrections to charts not
Airports Authority of India,                                     contained in the AIP
Rajiv Gandhi Bhavan,
Safdarjung Airport,                              Information on the correction to charts, which
NEW DELHI – 110 003.                             are not contained in the AIP India, can be
                                                 obtained from General Manager (Cartography)
     GEN 3.2.4 Aeronautical chart series         of AAI, CHQ, RG Bhavan, Safdarjung
               available                         Airport, New Delhi – 110 003. Telephone &
                                                 Telefax No. 011-24654157.
A list of aeronautical chart series available
followed by a general description of each                 GEN 3.3 Air traffic services
series is published in this subsection.
                                                         GEN 3.3.1 Responsible service
    GEN 3.2.5 List of aeronautical charts
              available                          AAI is responsible for the provision of Air
                                                 traffic services within the area indicated in
A list of aeronautical charts available is       para 3.3.2.Its postal address & the following
published in this subsection, including:         details are published in this sub section.

1) title of series;                              1) telephone number;

2) scale of series;                              2) telefax number;

3) name and number of each chart;                3) AFS address;

4) price per sheet.                              4)    a statement concerning the ICAO
                                                      documents on which the service is based
                                                      and a reference to the AIP location where
 GEN 3.2.6 Index to the World Aeronautical            differences are listed
    Chart (WAC) – ICAO 1:1 000 000
                                                        GEN 3.3.2 Area of responsibility
World Aeronautical Charts are published by
Survey of India in the WAC 1:1 000 000 scale     Area of responsibility for which air traffic
and can be obtained from;                        services are provided by AAI is indicated in
                                                 AIP, Para 2 of GEN 3.3.
Map Records and Issue Office (BNPD),                       GEN 3.3.3 Types of services
Survey of India,
PB No. 28,                                       A brief description of main types of air traffic
Hathibarkala Estate,                             services provided are published in AIP, Para 3
New Cantt. Road,                                 of GEN 3.3.
DEHRADUN – 248 001 (INDIA).
Tel. No. 0135-2747051-58.                             GEN 3.3.4 Coordination between the
                                                                operator and ATS
       GEN 3.2.7 Topographical charts
                                                 General conditions under which coordination
Wide variety of topographical charts are         between the operator and air traffic services is
published by Survey of India, Dehradun. Some     effected is published in AIP, Para 4 of
of them are restricted. Survey of India may be   GEN 3.3.
contacted on the above quoted address for
details of charts published.

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      GEN 3.3.5 Minimum flight altitude           A brief description of area of responsibility for
                                                  which CNS services are provided by AAI is
The criteria used to determine minimum flight     published in this subsection of AIP.
altitudes is published in AIP, Para 5 of
GEN 3.3.                                                    GEN 3.4.3 Types of service

       GEN 3.3.6 ATS units address list           A brief description of the main types of
                                                  service and facilities provided by AAI is
A list of Area Control Centres (ACC) and their    included in this subsection, which includes:
addresses are published in this sub section,
containing;                                       1) radio navigation services;

1) unit name;                                     2) mobile/fixed service;

2) postal address;                                3) broadcasting service;

3) telephone number;                              4) language used is English; and

4) telefax number;                                5) an indication of where detailed information
                                                      can be obtained is also published in this
and                                                   subsection with some graphical diagrams.

6) AFS address.                                          GEN 3.5 Meteorological services

● in AIP Para 6.0 of GEN 3.3.                             GEN 3.5.1 Responsible service

      GEN 3.4 Communication Services              The meteorological services for civil aviation
                                                  are provided by the India Meteorological
        GEN 3.4.1 Responsible service             Department (IMD), Department of Science &
                                                  Technology, Govt. of India. The postal address
Airports Authority of India is responsible for    of the IMD is given in this subsection, which
the overall provision and administration of the   includes:
aeronautical, telecommunication, navigation
and surveillance (CNS) facilities in India. Its   1) telephone number;
postal address and the following details are
published in (AIP) this subsection:-              2) telefax number;

1) telephone number;                              3) telegraphic address;

2) telefax number;                                4)    a statement concerning the ICAO
                                                       documents on which the service is based
3) AFS address;                                        is published in Para 10 of this subsection.
                                                       It also contains the departmental
4)     a statement concerning the ICAO                 publication of the IMD, containing
      documents on which the service is based          National regulations/ practices and
      is published in this subsection.                 differences from ICAO documents are
                                                       also listed here.
       GEN 3.4.2 Area of responsibility

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       GEN 3.5.2 Area of Responsibility                      GEN 3.5.6 Aircraft reports

A brief description of area for which               Requirements of the IMD for the making and
meteorological service is provided, is              transmission of aircraft reports is published in
published in this subsection of AIP.                this subsection. A list of met. reporting points
                                                    on international and domestic routes is also
     GEN 3.5.3 Meteorological observations          published in this subsection.
               and reports
                                                            GEN 3.5.7 VOLMET service
A detailed description of the meteorological
observations and forecast provided for              A description of VOLMET service provided
international air navigation is published in this   from Mumbai and Kolkata is published in this
subsection of AIP (Table 3.5.3), which              subsection, which includes the following
includes the following:                             details:

1) name of the station and the ICAO location        1) name of transmitting station;
                                                    2) call sign or identification and abbreviation
2) type and frequency of observation;                  for the radio communication emission;

3)    type of meteorological reports, e.g.          3) frequency or frequencies used for
      METAR, area forecast, route &                    broadcast:
      aerodrome forecast and trend forecast;
                                                    4) broadcasting period;
4)    details of meteorological services such as
      SIGMET, VOLMET Broadcast and ATIS             5) hours of service;
      broadcast are published in this subsection;
                                                    6) list of aerodromes for which reports and/or
5) hours of operation.                                  forecasts are included; and

                                                    7) reports, forecasts and SIGMET information
          GEN 3.5.4 Types of services                   included and remarks.

A brief description of the main types of
service provided, including details of briefing,     GEN 3.5.8 SIGMET and AIRMET service
consultation, display of meteorological
information, flight documentation available for     Note: Indian Meteorological Department, New
operators and flight crew members is                Delhi has filed the following difference with
published in this subsection.                       regard to AIRMET;

     GEN 3.5.5 Notification required from           “Area forecast for low level flights to support
               operators                            issuance of AIRMET services are not
Minimum amount of advance notice required
by the meteorological authority from operators      Hence, further references to AIRMET services
in respect of briefing, consultation and flight     in this subsection have not been included.
documentation and other meteorological
information they require is published in this       A description of the SIGMET services
subsection.                                         provided by IMD is published in Para 4.6 and
                                                    Para 8 of this subsection. Following details are

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1) name of the meteorological watch office,             GEN 3.6.2 Area of responsibility
   ICAO location indicator;
                                                  AAI is responsible for coordination with the
2) hours of service;                              agencies responsible for organising SAR
                                                  services within aeronautical SRR for aircraft
3) flight information region(s) or control        in distress. While Coast Guard is responsible
   area(s) served;                                for organizing SAR services within maritime
                                                  SRR for aircraft, ships, vessels and fishing
4) types of SIGMET information issued and         boats. AAI RCC shall inform Coast Guard
   validity periods;                              MRCC in case of aircraft in distress for
                                                  information and assistance.
5)    specific procedures applied to SIGMET
     information (e.g. for volcanic ash and                GEN 3.6.3 Types of service
     tropical cyclones);
                                                  A brief description of types of services and
6)    the air traffic services unit(s) provided   facilities provided including details of rescue
     with SIGMET;                                 coordination centers is given on pages GEN
                                                  3.6-2 to GEN 3.6-7.
7) additional information (e.g. concerning
   any limitation of service, etc.).                     Satellite Aided Search & Rescue

                                                  India is a participant in the COSPAS/SARSAT
 GEN 3.5.9 Other automated meteorological         system through Indian Space Research
           services                               Organization, Bangalore. Under Satellite aided
                                                  search & rescue programme, two Local User
Automated pre-flight met information is           Terminals (LUT) have been established at
partially available at Chennai.                   Bangalore and Lucknow, respectively. The
                                                  Mission Control Center (MCC) is located at
                                                  Bangalore and is connected with the RCCs at
         GEN 3.6 Search and rescue                Mumbai, Delhi, Kolkata and Chennai through
                                                  AFS network.
      GEN 3.6.1 Responsible service(s)
                                                          GEN 3.6.4 SAR agreements
The aeronautical search and rescue (SAR)
service is organized by AAI in accordance         At present, India has no SAR agreement with
with ICAO Annex 12 – Search & Rescue and          other countries.
International Aeronautical And Maritime
Search And Rescue (IAMSAR) Manual –                   GEN 3.6.5 Conditions of availability
Doc 9731 with the assistance of the Ministry
of Defense and other agencies, which have the     Requests for the entry of aircraft, equipment
responsibility for making the necessary           and personnel from other States to engage in
facilities available. While Coast Guard is        search for aircraft in Distress and rescue
responsible to organize Search And Rescue         survivors of crashed aircraft should be
within Maritime Search & Rescue regions.          transmitted to the Director General of Civil
Complete postal and telegraphic address of        Aviation. Instructions as to the control which
Airports Authority of India is given in           will be exercised on entry of such aircraft and/
GEN 1.1.                                          or personnel will be given by the Rescue
                                                  Coordination Centre of the relevant FIR. The
Differences, if any, with the above quoted        postal and telegraphic address of Director
ICAO documents are listed at GEN 1.7.

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General of Civil Aviation is given on page        General rules applicable in India in the
GEN 1.1.                                          provision of Air Traffic Services are published
                                                  under this heading in AIP India.

   GEN 3.6.6 Procedures and signals used
                                                          ENR 1.2 Visual flight rules
A brief description of the procedures and
signals employed by rescue aircraft and a table   Visual flight rules applicable in India are
showing the signals to be used by survivors,      published under this heading in AIP India.
are published in this subsection.
                                                          ENR 1.3 Instrument flight rules

        GEN 4. CHARGES FOR                        Instrument flight rules applicable in India are
            AERODROMES AND                        published under this heading in AIP India.
            AIR NAVIGATION
                                                         ENR 1.4 ATS airspace classification
                                                  The descriptions of classification of ATS
       GEN 4.1 Aerodrome charges
                                                  airspaces in India are published under this
                                                  heading in AIP India.
A brief description of aerodrome charges is
published in this sub-section of AIP India.
                                                         ENR 1.5 Holding, approach and
                                                                departure procedures
       GEN 4.2 Air Navigation services
                                                               ENR 1.5.1 General
                                                  The holding and approach procedure are based
A brief description of Air Navigation services
                                                  on criteria contained in ICAO Doc 8168-
charges is published in this sub-section of AIP
                                                  Procedures for Air Navigation Services –
                                                  Aircraft Operations (PANS-OPS).
      Note: Airport Users must check from
                                                           ENR 1.5.2 Arriving flights
AAI website ( or for changes, if any, to
                                                  Procedures for arriving flights as applicable in
aerodrome and air navigation services
                                                  India are published under this heading.
                                                          ENR 1.5.3 Departing flights
       PART 2 – EN-ROUTE (ENR)
                                                  Procedures for departing flights as applicable
    ENR 0.6 Table of contents to Part 2
                                                  in India are published under this heading.
A list of sections and subsections contained in
                                                           ENR 1.6 Radar services and
Part 2 – En-route is published under this
                                                   1.6.1 Comprehensive details of Radar control
                                                  procedures and provision of radar services,
                                                  both for Primary Radar and Secondary
                                                  Surveillance Radar (SSR), are published in the
                                                  AIP India under this heading.
           ENR 1.1 General rules

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1.6.2 Following topics have been covered:            ENR 1.9 Air traffic flow management

a) Use of radar in Air Traffic control Services                  (To be developed)
b) Radar & communication failure
    procedures.                                   Policy and procedures on RVSM as applicable
c) Radar separation minima.                       in India has been described in this section.
d) Information regarding adverse weather.
e) collision hazard information.                           ENR 1.10 Flight planning
f) emergency procedures.
g) procedures for operation of SSR                The procedures for submission of flight plans
   transponders and codes.                        applicable in India for the following types of
h) verification of accuracy of Mode-C derived     flights are given in this sub-section:
   level information.
i) the system of SSR code assignment for          a) Scheduled flights
   international and domestic flight.             b) Non-scheduled flights
                                                  c) Local/Training flights
  ENR 1.7 Altimeter setting procedures
                                                      ENR 1.11 Addressing of flight plan
 1.7.1     A description of basic altimeter                    messages
setting procedures is given in this sub-section
of the AIP India, in line with procedures         Message address to be used for flight plans, of
contained in DOC 4444-ATM/501 Chapter 4,          both IFR and VFR flights, are published in
Section 4.10. The altimeter setting procedures    tabular form in this subsection.
in use in Mumbai, Kolkata, Delhi and Chennai
FIRs.                                               ENR 1.12 Interception of civil aircraft

 1.7.2 A transition altitude has been specified   A complete statement of identification and
for each aerodrome. No transition altitude is     interception procedures and visual signals to
less than 4000 ft. (1200 mtrs.). Transition       be used in case of interception of an aircraft is
altitude for all aerodromes are given in the      given in this section. All applicable ICAO
table in ENR 1.7-4. Transition altitudes are      provisions are applied without any differences.
also indicated in the instrument approach         ADIZ as established in India has been
charts.                                           described.

1.7.3 System of cruising level and the table            ENR 1.13 Unlawful interference
of quadrantal and semi-circular system of
cruising level as applicable in India are also    Appropriate procedures to be applied in case
given.                                            of unlawful interference are published in this
1.7.4 Position Reporting Procedure in India is
also added in this section.                              ENR 1.14 Air traffic incidents

     ENR 1.8 Regional supplementary               A description of air traffic incidents reporting
             procedures                           system is published in this subsection, which
 Regional supplementary procedures are
applied in accordance with ICAO Doc 7030-         1) definition of air traffic incidents;
Regional Supplementary Procedures.
                                                  2) use of the “Air Traffic Incident Reporting

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3) reporting procedures (including in-flight       Upper Limits of ATS Routes and Area
   procedures); and                                Navigation Routes (RNAV).

4) purpose of reporting and handling of the        The description includes the following details:
                                                   1) route designator, required navigation
                                                      performance (RNP) type applicable,name-
                                                      codes and the geographical coordinates in
     ENR 2. AIR TRAFFIC SERVICES                      degrees, minutes and seconds of all
           AIRSPACE                                   significant points defining the routes,
                                                      which are also the compulsory reporting
            ENR 2.1 FIR, TMA                          points.

A detailed description of flight information       2) tracks or VOR radials to the nearest
regions (FIR) and terminal control areas              degree, geodesic distance to the nearest
(TMA) established in India are published in           tenth of a NM between each designated
this subsection with the following details:           reporting point.
1) name, geographical coordinates in degree
     and minutes of the FIR lateral limits and     3) upper and lower limits of the route
     in degrees, minutes and seconds of the           segments       and applicable airspace
     TMA lateral limits, vertical limits and          classification.
     class of airspace;                            4) lateral limits.

2) identification of unit providing the service;   5) direction of cruising levels.

3) call sign of aeronautical station serving the   6) remarks, including an indication of the
   unit and language(s) used, specifying the          controlling unit and its operating
   area and conditions, when and where to be          frequency.
   used, if applicable;
                                                            ENR 3.4 Helicopter routes
4)   frequencies supplemented by indications
     for specific purposes; and                    A description of helicopter routing to and from
                                                   IGI airport are given in this subsection.
5) remarks.

                                                              ENR 3.5 Other routes
     ENR 2.2 Other regulated airspace
A detailed description of Control Zones and
Aerodrome Traffic Zones are also published in               ENR 3.6 En-route holding
this subsection in AIP India
                                                   A description of en-route holding procedures
                                                   containing the following details is published in
           ENR 3. ATS ROUTES                       this subsection.

A detailed description of ATS routes               1) holding fix (navigation aid) with
established in India, both for international and      geographical coordinates in degrees,
domestic flights, are included in this section,       minutes and seconds.
(covering all the parameters as cited in Annex-
15 under ENR 3.1, 3.2 and 3.3) on Lower and        2) inbound track.

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3) direction of the procedure trun.                 code”) established for significant points at
                                                    positions not marked by the site of radio
4) minimum and maximum holding level.               navigation aids have been published,
5) time outbound in minutes.
                                                    1) name-code designator;
6) indication of the controlling unit and its
   operating frequency.                             2)     geographical coordinates in degrees,
                                                           minutes and seconds of the position; and

      ENR 4. RADIO NAVIGATION                       3) reference to ATS routes where the point is
            AIDS/SYSTEMS                               located.

                                                             ENR 4.5 Aeronautical ground
ENR 4.1 Radio navigation aids – en-route                             lights – en-route
            and stations
A list of radio navigation and landing aids
available at various stations are published in            ENR 5. NAVIGATION WARNINGS
this subsection. The list of stations is arranged
alphabetically. Following details are included:
                                                           ENR 5.1 Prohibited, restricted and
1) name of the station;                                            danger areas

2) identification allotted to the navigational      Full description of prohibited, restricted and
   or landing aids;                                 danger areas established have been published
                                                    in this subsection.
3) frequency of navigational/ landing aids;
                                                    Following details have been included:
4) hours of operation;
                                                    1) Identification, name and geographical
5)    geographical coordinates in degrees,             coordinates of the lateral limits in degrees,
     minutes and seconds of the position of the        minutes and seconds.
     transmitting antenna;
                                                    2) upper and lower limits; and
6) remarks – power output or range.
                                                    3) remarks including type of restriction or
     ENR 4.2 Special navigation systems                nature of hazard.

                       Nil                               ENR 5.2 Military exercise and training
                                                         areas and air defence identification zone
     ENR 4.3 Global navigation satellite                                 (ADIZ)
             system (GNSS)
                                                    Description of established military exercise
                       Nil                          and training areas have been published in
                                                    subsection ENR 5.1.
     ENR 4.4 Name-code designators for
             significant points                     Description of established air defence
                                                    identification zone (ADIZ) have been
An alphabetically arranged list of name-code        published in subsection ENR 1.12-4. The
designators (five-letter pronounceable “name-       description includes geographical coordinates

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of the lateral limits in degrees, minutes and       AD 1. AERODROMES/HELIPORTS –
seconds, upper and lower limits, and                        INTRODUCTION
applicable ADIZ procedures.
                                                    AD 1.1 Aerodrome/heliport availability
 ENR 5.3 Other activities of a dangerous
   nature and other potential hazards              Note: Since there are no Heliports in India at
                                                   present, further reference to Heliports has not
Activities of a dangerous nature and potential     been included in this section.
hazards are notified by class A Notams.
                                                   1)     All civil aerodromes under the
                                                         management of Airports Authority of
     ENR 5.4 Air Navigation obstacles                    India are open for public use within
                                                         published operational hours. Current
Minimum safe altitudes            have    been           NOTAMs may be consulted for latest
published for each route.                                operational hours.

ENR 5.5 Aerial sporting and recreational           2) The services & facilities are provided
        activities                                    at AAI aerodromes based on the
                                                      standards and recommended practices
Aerial sporting and recreational activities are       of Annex-14, Volume 1 and all other
notified by class A Notams.                           applicable ICAO Annexes and
 ENR 5.6 Bird migration and areas with
         sensitive fauna
                                                         The differences with the Annexes and
                                                         documents have been published in the
             Yet to be developed.
                                                         subsection GEN-1.7 of AIP India.

                                                   3) Military aerodromes are not available for
                                                      public use unless prior permission has
                                                      been obtained in accordance with
This chart is produced for the entire Indian
                                                      established procedures.
FIR. The aeronautical data includes all
aerodrome, prohibited, restricted & dangerous
                                                   4)     At present, CAT-III ILS has only been
areas and Air Traffic Services system in detail.
                                                         installed at IGI Airport, New Delhi. Low
This chart is produced by the Cartography
                                                         visibility    procedures    have     been
Section of AAI.
                                                         promulgated for the same.
                                                         Procedures for CAT-II/ CAT-III ILS will
                                                         be included in this subsection as and when
Part 3-AERODROMES (AD) has                 been
                                                         they are installed and operational at other
published as VOLUME II of AIP India

                                                        AD 1.2 Rescue and firefighting services
    AD 0.6 Table of contents to Part 3
                                                               and snow plan
A list of sections and subsections contained in
                                                    AD 1.2.1 Rescue and firefighting services
Part 3 – Aerodromes (AD) is published under
this heading.
                                                   Adequate rescue and firefighting vehicles,
                                                   equipment and personnel have been provided
                                                   at all aerodromes available for use by
                                                   commercial transport. An indication of rescue

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and firefighting categories available at various   The ICAO location indicator allocated to the
aerodromes are published in sub-section AD         aerodrome and the name of aerodrome has
2.6 of each aerodrome.                             been given under this heading.

             AD 1.2.2 Snow plan                         **** AD 2.2 Aerodrome geographical
                                                            and administrative data
Since none of the international aerodromes in
India are affected by snowfall, no snow plan       The       aerodrome      geographical       and
has been published for any aerodrome.              administrative data including the following
                                                   details have been included in this subsection.
        AD 1.3 Index to aerodromes
                                                   1)    aerodrome reference point (geographical
A list of 46 operational aerodromes has been             coordinates in degrees, minutes and
published under this heading, which includes             seconds) and its site;
the following:
                                                   2) direction and distance of aerodrome
1) aerodrome name and ICAO location                   reference point from center of the city or
   indicator;                                         town which the aerodromes serves;

2) type of traffic permitted to use the            3)     aerodrome elevation to the nearest metre
   aerodrome           (international/national,          (foot), and reference temperature;
   IFR/VFR,        scheduled/non-scheduled,
   private); and                                   4)      geoid undulation at the aerodrome
3) reference to subsection of AIP in which               elevation position to the nearest metre or
   aerodrome details are presented.                      foot;

     AD 1.4 Grouping of aerodromes                 Remarks: Geoid undulation has not been
                                                   published so far.
A list of international aerodromes and
domestic aerodromes described in the AIP           5) magnetic variation to the nearest degree,
have been published under this heading.               date of information and annual change;

           AD 2 AERODROMES                         6)      name of aerodrome administration,
                                                         address, telephone & telefax numbers and
Note:     Complete     administrative    and             AFS address;
operational details of 50 aerodromes have
been published in this section. The format as      7) types of traffic permitted to use the
laid-down in ICAO Annex-15 – Aeronautical             aerodrome (IFR/VFR); and
Information Services has been followed.
                                                   8) remarks.
Various headings of the ICAO format under
which the information has been listed are as               **** AD 2.3 Operational hours
                                                   Detailed description of the hours of operation
                                                   of services at the aerodrome, including:
    Note. - **** has been replaced by the
    relevant ICAO location indicator of            1) aerodrome administration;
    each aerodrome.
                                                   2) customs and immigration;
     **** AD 2.1 Aerodrome location
          indicator and name                       3) health and sanitation;

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4) AIS briefing office;                           5) bank and post office at or in the vicinity of
5) ATS reporting office (ARO);
                                                  6) tourist office; and
6) MET briefing office;
                                                  7) remarks.
7) air traffic service;

8) fuelling;
                                                     **** AD 2.6 Rescue and firefighting
9) handling;                                                     services

10) security;                                     Detailed description of the rescue and
                                                  firefighting services and equipment available
11) de-icing; and                                 at the aerodrome, including:

12) remarks.                                      1) aerodrome category for firefighting;

                                                  2) rescue equipment;
    **** AD 2.4 Handling services and
                facilities                        3) capability for removal of disabled aircraft;
Detailed description of the handling services
and facilities available at the aerodrome,        4) remarks.
1) cargo-handling facilities;

2) fuel and oil types;                             **** 2.7 Seasonal availability – clearing
3) fuelling facilities and capacity;

4) de-icing facilities;                           Detailed description of the equipment and
                                                  operational priorities established for the
5) hangar space for visiting aircraft;            clearance of aerodrome movement areas,
6) repair facilities for visiting aircraft; and

7) remarks.                                       1) type(s) of clearing equipment;

      **** AD 2.5 Passenger facilities            2) clearance priorities; and

Brief description of passenger facilities         3) remarks.
available at the aerodrome, including:
1) hotel(s) at or in the vicinity of aerodrome;
                                                  Note: All AAI aerodromes are operational
2) restaurant(s) at or in the vicinity of         during all seasons.

3) transportation possibilities;

4) medical facilities;

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 **** AD 2.8 Aprons, taxiways and check                c) obstacle position, represented by
         locations/positions data                         geographical coordinates in degrees,
                                                          minutes, seconds and tenths of
Details related to the physical characteristics           seconds;
of aprons, taxiways and locations/positions of
designated checkpoints, including:                     d) obstacle elevation and height to the
                                                          nearest metre and foot;
1) surface and strength of aprons;
                                                       e) obstacle marking, and type and colour
2) width, surface and strength of taxiways;               of obstacle lighting (if any);

3) location and elevation to the nearest metre         f) if appropriate, an indication that the
   (foot) of altimeter checkpoints;                       list of obstacles is available in
                                                          electronic form, and a reference to
4) location of VOR checkpoints;                           GEN 3.1.6.

5)   position of INS checkpoints in degrees,      Remarks: List of obstacles is not available in
     minutes, seconds and hundredths of           electronic form.
     seconds; and
                                                  **** AD 2.11 Meteorological information
6) remarks.                                                     provided

                                                  Detailed description of meteorological
 **** AD 2.9 Surface movement guidance            information provided at the aerodrome and an
     and control system and markings              indication of which meteorological office is
                                                  responsible for the service enumerated,
Brief description of the surface movement         including:
guidance and control system and runway and
taxiway markings, including:                      1) name of the associated meteorological
1) use of aircraft stand identification signs,
   taxiway      guide   lines   and     visual    2) hours of service and, where applicable, the
   docking/parking guidance system at                designation      of    the      responsible
   aircraft stands;                                  meteorological office outside these hours;
2) runway and taxiway markings and lights;
                                                  3) office responsible for preparation of TAFs
3) stop bars (if any); and                           and periods of validity and interval of
                                                     issuance of the forecasts;
4) remarks.
                                                  4) availability of the trend forecasts for the
     ****AD 2.10 Aerodrome obstacles                 aerodrome, and interval of issuance;

Detailed description of obstacles, including:     5) information on how briefing and/or
                                                     consultation is provided;
Obstacles in aerodrome area:                      6) type of flight documentation supplied and
                                                     language(s) used in flight documentation;
     a) obstacle identification or designation;
                                                  7)   charts and other information displayed or
     b) type of obstacle;                              available for briefing or consultation;

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8) supplementary equipment available for            11) the existence of an obstacle-free zone; and
   providing information on meteorological
   conditions, e.g. weather radar and receiver      12) remarks.
   for satellite images;

9)    the air traffic services unit(s) provided           **** AD 2.13 Declared distances
     with meteorological information; and
                                                    Detailed description of declared distances to
10) additional information (e.g. concerning         the nearest metre for each direction of each
    any limitation of service, etc.).               runway, including:

         **** AD 2.12 Runway physical               1) runway designator;
                                                    2) take-off run available;
Detailed description of runway physical
characteristics, for each runway, including:        3) take-off distance available;

1) designations;                                    4) accelerate-stop distance available;

2) true bearings to one-hundredth of a degree;      5) landing distance available; and

3) dimension of runways to the nearest metre;       6) remarks.

4) strength of pavement (PCN and associated
   data) and surface of each runway and                      **** AD 2.14 Approach and
   associated stopways;                                            runway lighting

5)   geographical coordinates in degrees,           Detailed description of approach and runway
     minutes, seconds and tenth of seconds for      lighting, including:
     each threshold and runway end.
                                                    1) runway designator;
6) elevation of:
                                                    2) type, length and intensity of approach
     -    thresholds of a non-precision approach        lighting system;
          runway to the nearest metre (foot); and
                                                    3)   runway threshold lights, colour and wing
     -    thresholds and the highest elevation of        bars;
          the touchdown zone of a precision
          approach runway to the nearest one-       4)    type of visual approach slope indicator
          half metre (foot);                             system;

7) slope of each runway and associated              5) length of runway touchdown zone lights;
                                                    6)    length, spacing, colour and intensity of
8)    dimension of stopway (if any) to the               runway center line lights;
     nearest metre;
                                                    7)    length, spacing, colour and intensity of
9)   dimensions of clearway (if any) to the              runway edge lights;
     nearest metre;
                                                    8) colour of runway end lights and wing bars;
10) dimensions of strips;

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9) length and colour of stopway lights; and       3)  TLOF and FATO area dimensions to the
                                                     nearest metre or foot, surface type, bearing
10) remarks.                                         strength and marking;
                                                  4) true bearings to one-hundredth of a degree
                                                     of FATO;
          **** AD 2.15 Other lighting,
            secondary power supply                5) declared distances available, to the nearest
                                                     metre or foot;
Description of other lighting and secondary
power supply including:                           6) approach and FATO lighting; and

1) location, characteristics and hours of         7) remarks.
   operation           of           aerodrome
   beacon/identification beacon (if any);         Note: Helicopter landing areas have not been
                                                  established at AAI airports at present.
2)     location and lighting (if any) of
      anemometer/landing direction indicator;     **** AD 2.17 Air traffic services airspace

3)     taxiway edge and taxiway center line       Detailed description of air traffic services
      lights;                                     (ATS) airspace organized at the aerodrome,
4) secondary power supply including switch-
   over time; and                                 1) airspace designation and geographical
                                                     coordinates in degrees, minutes and
5) remarks.                                          seconds of the lateral limits;

                                                  2) vertical limits;
     **** AD 2.16 Helicopter landing area
                                                  3) airspace classification;
Detailed description of helicopter landing area
provided at the aerodrome, including:             4)   call sign and language(s) of the ATS unit
                                                       providing service;
1)     geographical coordinates in degrees,
      minutes, second and hundredths of           5) transition altitude; and
      seconds and geoid undulation to the
      nearest one-half metre or foot of the       6) remarks.
      geometric center of touch-down and lift-
      off (TLOF) or of each threshold of final           **** AD 2.18 Air traffic services
      approach and take-off (FATO) area                      communication facilities
      (where appropriate);
                                                  Detailed description of air traffic services
2) TLOF and/or FATO area elevation:               communication facilities established at the
                                                  aerodrome, including:
      -   for non-precision approaches, to the
          nearest metre or foot; and              1) service designation;

      -   for precision approaches, to      the   2) call sign;
          nearest one-half metre or foot;
                                                  3) frequency(ies);

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4) hours of operation; and                           Noise abatement procedures, if applicable,
                                                     may be listed here.
5) remarks.

                                                          **** AD 2.22 Flight procedures
      **** AD 2.19 Radio navigation and
                 landing aids                        Detailed description of the conditions and
                                                     flight procedures, including radar procedures,
Detailed description of radio navigation and         established on the basis of airspace
landing aids associated with the instrument          organization at the aerodrome may be
approach and the terminal area procedures at         published here.
the aerodrome, including:
                                                        **** AD 2.23 Additional information
1)     type of aids, magnetic variation to the
      nearest degree, as appropriate, and type of    Additional information at the aerodrome, such
      supported operation for ILS/MLS, basic         as an indication of bird concentrations at the
      GNSS, SBAS and GBAS.                           aerodrome, together with an indication of
                                                     significant daily movement between resting
Remarks: MLS, GNSS, SBAS and GBAS are                and feeding areas, to the extent practicable
not available in our country at the moment.          may be published here.

2) identification, if required;                             **** AD 2.24 Charts related
                                                                  to an aerodrome
3) frequency(ies), as appropriate;
                                                     The following charts related to an aerodrome
4) hours of operation, as appropriate;               may be included in the following order as
5)     geographical coordinates in degrees,
      minutes, seconds and tenths of seconds of      1) Aerodrome Chart – ICAO;
      the position of the transmitting antenna, as
      appropriate;                                   2) Aircraft Parking/Docking Chart – ICAO;

6)    elevation of the transmitting antenna of       3) Aerodrome Ground Movement Chart –
      DME to the nearest 30 m (100 ft) and of           ICAO;
      DME/P to the nearest 3 m (10 ft); and
                                                     4) Aerodrome Obstacle Chart – ICAO Type
7) remarks.                                             A (for each runway);

                                                     5) Precision Approach Terrain Chart – ICAO
     **** AD 2.20 Local traffic regulations             (precision approach Cat II and III
Detailed description of regulations applicable
to the traffic at the aerodrome including routes     6) Area Chart – ICAO (departure and transit
for taxiing aircraft, parking regulations,              routes);
training flights and similar but excluding flight
procedures may be given here.                        7) Standard Departure Chart – Instrument –

        **** AD 2.21 Noise abatement                 8) Area Chart – ICAO (arrival and transit

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9) Standard Arrival Chart – Instrument –           4.3.7 AIP amendments are issued on a
   ICAO;                                           regular interval, i.e., once in a year in the
                                                   month of April.
10) Radar Minimum Altitude Chart – ICAO;
                                                     4.4 SPECIFICATION FOR AIP
11) Instrument Approach Chart – ICAO (for                   AMENDMENTS
    each runway and procedure type);
                                                   4.4.1 Permanent changes to the AIP are
12) Visual Approach Chart – ICAO; and              published as AIP Amendments.
13) Bird concentration in the vicinity of the      4.4.2 Each AIP Amendment is allocated a
    aerodrome.                                     serial number along with the year of
While, Instrument Approach Charts have also        publication.
been published for domestic aerodromes.            4.4.3 AIRAC AIP Amendment is not issued
                                                   at present by AAI.
            AD 3. HELIPORTS                        4.4.4 When an AIP Amendment is issued, it
                                                   includes reference to the serial number of the
                      NIL                          AIP Supplements and NOTAMs which have
                                                   been incorporated into the Amendment.

          OF AIP                                            SUPPLEMENT
4.3.1 AIP India has been published in two          4.5.1 Temporary changes of long duration
volumes. Volume 1 contains Part 1 – General        (3 months or longer) and information of short
(GEN) and Part 2 – En-Route (ENR).                 duration which contains extensive text and/or
                                                   graphics is published as AIP Supplement.
Volume II contains Part 3 – Aerodromes
(AD).                                              4.5.2 AIP Supplement pages are of yellow
                                                   colour to make it conspicuous.
4.3.2 AIP India has been published in loose-
leaf form.                                         4.5.3 Each AIP Supplement is allocated a
                                                   serial number which is consecutive and based
4.3.3 Each page has been dated. The date           on the calendar year.
consists of day, month (by name) and year.
                                                   4.5.4 Each AIP Supplement issued in
4.3.4 (a) Each page contains identity of the       replacement of a NOTAM includes a reference
issuing authority, i.e., Airports Authority of     to the serial number of the NOTAM.
                                                   4.5.5 A Checklist of valid AIP Supplements
(b) The identity of the issuing State, i.e., AIP   is issued every month. The checklist is issued
India is published on each page of the AIP.        through the medium of the monthly printed
                                                   plain language list of valid NOTAM.
4.3.5 A Check-list giving the current date of
each page of the AIP is published as part of       4.5.6 AIP Supplement pages shall be kept in
Volume 1.                                          the AIP as long as all or some of their contents
                                                   remain valid.
4.3.6 New information on a re-printed page
has been identified by a distinctive font
change, i.e., bold italics.

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4.5.7 ICAO        recommends   that    AIP
Supplement pages should be kept as the first
item in the AIP Parts.

             4.6 Distribution
4.6.1 AIP, AIP Amendments and AIP
Supplements are distributed to all the
operational field stations of AAI and to the
subscribers of AIP Amendment Service.

4.6.2 AIP      Amendments      and    AIP
supplements are made available by the most
expeditious means.

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                                        CHAPTER 5.

              5.1 Origination
5.1.1 A NOTAM shall be originated and               d) establishment,     withdrawal   or
issued promptly whenever the information to            significant changes made to visual
be distributed is of a temporary nature and of         aids;
short duration or when operationally
significant permanent changes, or temporary         e) interruption of or return to operation
changes of long duration are made at short             of major components of aerodrome
notice, except for extensive text and/or               lighting systems;
                                                    f) establishment,      withdrawal       or
Note : - Information of short duration                 significant    changes      made     to
containing extensive text and/or graphics is           procedures for air navigation services;
published as an AIP Supplement (see Chapter
4, Para 4.5 of this manual).                        g) occurrence or correction of major
                                                       defects or impediments in the A NOTAM shall be originated and                manoeuvring area;
issued concerning the following information:
                                                    h) changes to and limitations on
   a) establishment, closure or significant            availability of fuel, oil and oxygen;
      changes in operation of aerodrome(s)
      or runways;                                   i)   major changes to search and rescue
                                                         facilities and services available;
   b) establishment,    withdrawal    and
      significant changes in operation of           j)   establishment, withdrawal or return to
      aeronautical services (AGA, AIS,                   operation of hazard beacons marking
      ATS, COM, MET, SAR, etc.);                         obstacles to air navigation;

   c) establishment or withdrawal of                k) changes in regulations requiring
      electronic and other aids to air                 immediate action, e.g., prohibited
      navigation and aerodromes. This                  areas for SAR action;
      includes; interruption or return to
      operation, change of frequencies,             l)   presence of hazards which affect air
      change in notified hours or service,               navigation     (including      obstacle,
      change of identification, change of                military exercises, displays, races and
      orientation (directional aids), change             major parachuting events outside
      of location, power increase or decrease            promulgated sites);
      amounting to 50 per cent or more,
      change in broadcast schedules or              m) erecting or removal of, or changes to,
      contents,     or     irregularity    or          obstacle to air navigation in the take-
      unreliability of operation of any                off/climb, missed approach, approach
      electronic aid to air navigation, and            areas and runway strip;
      air-ground communication services;
                                                    n) establishment     or   discontinuance
                                                       (including activation or deactivation)

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        as applicable, or changes in the status      w) establishment of operations of
        of prohibited, restricted or danger             humanitarian relief missions, such as
        areas;                                          those undertaken under the auspices of
                                                        United Nations, together with
   o) establishment or discontinuance of                procedures and/or limitations which
      areas or routes or portions thereof               affect air navigation; and
      where the possibility of interception
      exists and where the maintenance of            x) implementation        of      short-term
      guard on the VHF emergency                        contingency measures in cases of
      frequency 121.5 MHz is required;                  disruption, or partial disruption, of air
                                                        traffic services and related supporting
   p) allocation, cancellation or change of             services.
      location indicators;
                                         Recommendation.- The need for
   q) significant changes in the level of         origination of a NOTAM should be considered
      protection normally available at an         in any other circumstance which may affect
      aerodrome for rescue and firefighting       the operations of aircraft.
      purposes. NOTAM shall be originated
      only when a change of category is  The following information shall not be
      involved and such change of category        notified by NOTAM:
      shall be clearly stated;
                                                     a) routine maintenance work on aprons
   r) presence or removal of, or significant            and taxiways which does not affect the
      changes in, hazardous conditions due              safe movement of aircraft;
      to snow, slush, ice or water on the
      movement area;                                 b) runway marking works, when aircraft
                                                        operations can safely be conducted on
   s) outbreaks of epidemics necessitating              other available runways, or the
      changes in notified requirements for              equipment used can be removed when
      inoculations and quarantine measures;             necessary;

   t)   forecasts of solar cosmic radiation,         c) temporary obstructions in the vicinity
        where provided;                                 of aerodromes that do not affect the
                                                        safe operation of aircraft;
   u) an operationally significant change in
      volcanic activity, the location, date          d) partial failure of aerodrome lighting
      and time of volcanic eruptions and/or             facilities where such failure does not
      horizontal and vertical extent of                 directly affect aircraft operations;
      volcanic ash cloud, including direction
      of movement, flight levels and routes          e) partial temporary failure of air-ground
      or portions of routes which could be              communications       when       suitable
      affected;                                         alternative frequencies are known to
                                                        be available and are operative;
   v) release into the atmosphere of
      radioactive    materials   or   toxic          f) the lack of apron marshalling services
      chemicals following a nuclear or                  and road traffic control;
      chemical incident, the location, date
      and time of the incident, the flight           g) the unserviceability of location,
      levels and routes or portions thereof             destination or other instruction signs
      which could be affected and the                   on the aerodrome movement area;
      direction of movement;

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    h) parachuting when in uncontrolled                   5.2 General Specifications
       airspace under VFR [see ( l )],
       when controlled, at promulgated sites       5.2.1 Except as provided in 5.2.3
       or within danger or prohibited areas;       (SNOWTAM) and 5.2.4 (ASHTAM), each
                                                   NOTAM shall contain the information in the
    i)   other information     of   a   similar    order shown in the NOTAM Format. (see page
         temporary nature.                         5-6). At least seven days’ advance notice        5.2.2 Text of NOTAM shall be composed of
shall be given of the activation of established    the      significations/uniform     abbreviated
danger, restricted or prohibited areas and of      phraseology assigned to the ICAO NOTAM
activities requiring temporary airspace            Code complemented by ICAO abbreviations,
restrictions other than for emergency              indicators, identifier, designators, call signs,
operations.                                        frequencies, figures and plain language.
                                          English is used to express all parts in Recommendation. – Notice of any          plain language in NOTAM.
subsequent cancellation of the activities or any
reduction of the hours of activity or the          5.2.3 Information concerning snow, slush,
dimensions of the airspace should be given as      ice and standing water on aerodrome
soon as possible.                                  pavements shall, when reported by means of
                                                   SNOWTAM, contain the information in the
Note. – Whenever possible, at least 24 hours’      order shown in the SNOWTAM Format in
advance notice is desirable, to permit timely      Para 5, page 5-25 of this manual.
completion of the notification process and to
facilitate airspace utilization planning.          Remarks.-     Though the need to issue a
                                                   SNOWTAM has not arisen so far, but the NOTAM notifying unserviceability of        SNOWTAM Format from Annex 15 has been
aids to air navigation, facilities or              included in this manual to explain the ICAO
communication services shall give an estimate      provisions that exist, for use if the need arises.
of the period of unserviceability or the time at
which restoration of service is expected.          5.2.4 Information         concerning       an
                                                   operationally significant change in volcanic When an AIP Supplement is published        activity, a volcanic eruption and/or volcanic
in accordance with AIRAC procedures,               ash clouds shall, when reported by means of
NOTAM shall be originated giving a brief           an ASHTAM contain the information in the
description of the contents, the effective date    order shown in the ASHTAM Format in
and the reference number to the supplement.        Para 5.7 and page 5-29.
This NOTAM (Trigger NOTAM) shall come
into force on the same effective date as the       5.2.5 The NOTAM originator shall allocate
supplement and shall remain valid in the pre-      to each NOTAM a series identified by a letter
flight information bulletin for a period of        and a four-digit number followed by a stroke
fourteen days.                                     and a two-digit number for the year. The four-
                                                   digit number shall be consecutive and based
Note.- Guidance material for the origination       on the calendar year, e.g. A0050/05. AAI
of Trigger NOTAM announcing the existence          issues NOTAM in A, B, C, D & G series.
of an AIRAC AIP Supplement is contained in
part 5.5 of this manual.                           5.2.6 When errors occur in a NOTAM, a
                                                   NOTAM with a new number to replace the
                                                   erroneous NOTAM shall be issued.

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5.2.7 When a NOTAM is issued which     Where no ICAO location indicator is
cancels or replaces a previous NOTAM, the       assigned to the location, its place name shall
series and number of the previous NOTAM         be entered in plain language.
shall be indicated. The series, location        5.2.13 A checklist of valid NOTAM shall be
indicator and subject of both NOTAM shall be    issued as a NOTAM over the Aeronautical
the same. Only one NOTAM shall be               Fixed Service (AFS) at intervals of not more
cancelled or replaced by a NOTAM.               than one month. One NOTAM shall be issued
                                                for each series. One the following message identifiers
is to be inserted as appropriate:      A checklist of NOTAM shall refer to
                                                the latest AIP Amendments, AIP Supplements
   a) NOTAMN if it concerns a NOTAM             and at least the internationally distributed AIC.
      containing a new information.
                                       A checklist of NOTAM shall have the
   b) NOTAMR if it concerns a NOTAM             same distribution as the actual message series
      replacing a previous NOTAM                to which they refer and shall be clearly
      followed     by    the     series and     identified as checklist.
      number/year     of     the     NOTAM
      replaced., i.e. A0125/03 NOTAMR  A monthly printed plan-language list
      A0123/03.                                 of valid NOTAM, including indications of the
                                                latest AIP Amendments, AIC issued and a
   c) NOTAMC if it concerns a NOTAM             checklist of AIP Supplements, shall be
      canceling a previous NOTAM,               prepared with a minimum of delay and
      followed    by    the     series   and    forwarded by the most expeditious means to
      number/year    of     the     cancelled   recipients of the Integrated Aeronautical
      NOTAM, e.g. A0460/03 NOTAMC               Information Package.
                                                  General Instructions for origination and
5.2.8 Each NOTAM shall deal with only                    cancellation of NOTAM
one subject and one condition of the subject.
                                                5.2.14 Request for issuance of NOTAM by
5.2.9 Each NOTAM shall be as brief as           various agencies at an airport, such as Met
possible and so compiled that its meaning is    department, Fire services, Engg. Wing,
clear without the need to refer to another      Refueling companies, etc. shall be routed
document.                                       through ATS Incharge/ATS units.

5.2.10 Each NOTAM shall be transmitted as Request for issuance of NOTAM by
a single telecommunication message.             airport, not connected on AFTN, shall be sent
                                                by FAX.
5.2.11 A NOTAM containing permanent or
temporary information of long duration shall Request for issue of NOTAM for un-
carry appropriate AIP or AIP Supplement         controlled/functional aerodromes shall be
references.                                     taken as follows:-

5.2.12 Location indicators included in the          a) the un-controlled station should
text of a NOTAM shall be those contained in            request the major station under which
Location Indicators (Doc 7910).                        it is designated/controlled/situated. In no case shall a curtailed form of       b) The major station, under whose
such indicators be used.                               operational control the un-controlled
                                                       station is situated, should request

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        Regional NOF/AIS for         NOTAM Factual/typing/printing errors, if any,
        action giving the details.                noticed in AIP/AIP supplement shall be
                                                  brought to the notice of the AIS section of the
    c) The Regional NOF centre/AIS shall          CHQ for rectification.
       take NOTAM under appropriate series
       (e.g. C Series).                  The aviation agency who made the
                                                  request for origination of a NOTAM shall be
    d) A copy of the NOTAM shall be issued        responsible to ensure that the request for
       to G.M. (Ops) of the Region.               cancellation of NOTAM is made when the
                                                  facility becomes serviceable or the condition The words “request for NOTAM             no longer exists.
action” must precede in the text of the
message sent for origination of a NOTAM. When establishing or withdrawing
                                                  facilities, AIS section of the CHQ shall be The message shall be sent in writing     informed for proper amendment of the relevant
and shall be duly signed by Incharge of the       section/pages of AIP India, if appropriate.
aviation agency making the request for
origination of a NOTAM. Before promulgation of a NOTAM,
the text in the NOTAM Format shall be
checked with the original request to detect any
discrepancy or mistake.

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                                                    NOTAM             FORMAT
Priority Indicator

Date and time of filing
Originator’s Indicator                                                                                                                   ⇚(
                                                         Message Series, Number and Identifier

NOTAM containing new information                   ………………………… NOTAMN
                                                   (series and number/year)

                                                   ………………………… NOTAMR……………………………………………………
NOTAM replacing a previous NOTAM
                                                   (series and number/year) (series and number/year of NOTAM to be replaced)

                                                   ………………………… NOTAMC……………………………………………………                                                 ⇚
NOTAM canceling a previous NOTAM                   (series and number/year) (series and number/year of NOTAM to be replaced)

                                                        Purpose              Lower      Upper
        FIR              NOTAM Code      Traffic                   Scope                                   Coordinates, Radius
                                                                             Limit      Limit
Q                    Q                                                                                                                       ⇚
Identification of ICAO location indicator in which the facility, airspace                            A)
or condition reported on is located
                                                                 Period of Validity
From (date-time group)                        B)

To (PREM or date-time group)                       C)                                                                            EST*
Time schedule (if applicable)                      D)

                                      Text of NOTAM; Plain-language Entry (using ICAO Abbreviations)


Lower Limit                   F)

Upper Limit                   G)                                                                                                         )⇚

                                                                                                                        *Delete as appropriate

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              5.3 Instructions for the completion of the NOTAM Format

                5.3.1 General                        The ICAO location indicators of the FIRs
                                                     concerned shall then be listed in Item A). The NOTAM Format aims at
standardizing the presentation of the different NOTAM CODE – All NOTAM Code
types of information promulgated by NOTAM            groups contain a total of five letters and the
in order to facilitate understanding of the          first letter is always the letter Q. The second
message by the addressee.                            and third letters identify the subject, and the
                                                     fourth and fifth letters denote the status of the The NOTAM Format consists of two             subject reported upon. For combinations of
parts;                                               second and third and fourth and fifth letters,
                                                     insert the ICAO NOTAM codes listed in 5.4.
    a) the part of interest to the                   Insert one of the following combinations, as
       communication service, handling the           appropriate:
       AFS message, i.e. the part containing
       the priority indicator, addresses, date           a) If the subject is not listed in the
       & time of filing and the originator’s                NOTAM Code list 5.4, insert “XX” as
       indicator.                                           the second and third letters (e.g.
    b) The part containing the NOTAM
       information.                                      b) If the condition of the subject is not
                                                            listed in the NOTAM Code list 5.4, The qualifier line (Item Q) and all                 insert “XX” as the fourth and fifth
identifiers (Item A) to G) inclusive) each                  letters (e.g. QFAXX);
followed by a closing parenthesis, as shown in
the format, shall be transmitted unless there is         c) When       a     NOTAM       containing
no entry to be made against a particular                    operationally significant information
identifier.                                                 is issued and when it is used to
                                                            announce existence of AIRAC AIP
        5.3.2 NOTAM numbering                               Supplements, insert “TT” as the fourth
                                                            and fifth letters of the NOTAM Code;
Each NOTAM shall be allocated a series
identified by a letter and a four-digit number           d) When a NOTAM is issued containing
followed by a stroke and a two-digit number                 a checklist of valid NOTAM, insert
for the year (e.g. A0023/03).                               “KKKK” as the second, third, fourth
                                                            and fifth letters; and
         5.3.3 Qualifiers (Item Q)
                                                         e) The following fourth and fifth letters Item Q) is divided in eight fields, each            of the NOTAM Code shall be used in
separated by a stroke. If no entry is to be made            NOTAM cancellations:
in a field, it is not necessary to transmit blanks
between the strokes. The definition of each                  AK :    RESUMED NORMAL
field is as follows:                                                 OPERATION
                                                             AL :    OPERATIVE (OR FIR – ICAO location indicator of                             RE-OPERATIVE) SUBJECT
affected FIR or, if applicable to more than one                      TO PREVIOUSLY
FIR within a State, the first two letters of the                     PUBLISHED LIMITATIONS/
ICAO location indicator of a State plus “XX”.                        CONDITIONS

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        AO :     OPERATIONAL                                      5.3.4 Item A)
        CC :     COMPLETED
        XX :     PLAIN LANGUAGE          Insert the location indicator as
                                                  contained in ICAO Doc 7910 of the aerodrome TRAFFIC                                   or FIR in which the facility, airspace, or
                                                  condition being reported on is located. More
    I = IFR                                       than one FIR may be indicated when
    V = VFR                                       appropriate. If there is no available ICAO
    K = NOTAM is a checklist                      location indicator, use the ICAO nationality
                                                  letter as given in ICAO Doc 7910, Part 2, plus PURPOSE                                   “XX” and followed up in Item E) by the name,
                                                  in plain language.
    N = NOTAM selected for the immediate
        attention of aircraft operator   If information concerns GNSS, insert
    B = NOTAM selected for PIB entry              the appropriate ICAO location indicator
    O = NOTAM concerning flight                   allocated for a GNSS element or the common
        Operations                                location indicator allocated for all elements of
    M = Miscellaneous NOTAM; not                  GNSS (except GBAS).
        subject for a briefing, but it is
        available on request                      Note.- In the case of GNSS, the location
    K = NOTAM is a checklist                      indicator may be used when identifying a
                                                  GNSS element outage (e.g. KNMH for a GPS SCOPE                                     satellite outage).

    A   =   Aerodrome                                             5.3.5 Item B)
    E   =   En-route
    W   =   Nav Warning                           For date-time group use a ten-figure group,
    K   =   NOTAM is a checklist                  giving year, month, day, hours and minutes in
                                                  UTC. This entry is the date-time at which the and        LOWER/UPPER –          NOTAMN comes into force. In the cases of
LOWER and UPPER limits shall always be            NOTAMR and NOTAMC, the date-time
filled and shall only be expressed in flight      group is the actual date and time of the
levels (FL). In the case of navigation warnings   NOTAM origination.
and airspace restrictions, values entered shall
be consistent with those provided under Items                    5.3.6 Item C)
F) and G).
                                                  With the exception of NOTAMC, a date-time
If the subject does not contain specific height   group (a ten-figure group giving year, month,
information, insert “000” for LOWER and           day, hours and minutes in UTC) indicating
“999” for UPPER as default values.                duration of information shall be used unless
                                                  the information is of a permanent nature in COORDINATES, RADIUS – The                 which case the abbreviation “PREM” is
latitude and longitude accurate to one minute,    inserted instead. If the information on timing
as well as a three-digit distance figure giving   is uncertain, the approximate duration shall be
the radius of influence in NM (e.g.               indicated using a date-time group followed by
4700N01140E043).        Coordinates     present   the abbreviation “EST”. Any NOTAM which
approximate center of circle whose radius         includes an “EST” shall be cancelled or
encompasses the whole area of influence, and      replaced before the date-time specified in
if the NOTAM affects the entire FIR or more       Item C).
than one FIR, enter the default value “999” for

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                5.3.7 Item D)                                  5.3.9 Item F) and G)

If the hazard, status of operation or condition     These items are normally applicable to
of facilities being reported on will be active in   navigation warnings or airspace restrictions
accordance with a specific time and date            and are usually part of the PIB entry. Insert
schedule between the dates-times indicated in       both lower and upper height limits of activities
Item B) and C), insert such information under       or restrictions, clearly indicating reference
Item D). If item D) exceeds 200 characters,         datum and units of measurement.
consideration shall be given to providing such
information in a separate, consecutive

                5.3.8 Item E)

Use decoded NOTAM Code, complemented
where necessary by ICAO abbreviations,
indicators, identifiers, designators, call signs,
frequencies, figures and plain language. This
entry shall be clear and concise in order to
provide a suitable PIB entry. In the case of
NOTAMC, a subject reference and status
message shall be included to enable accurate
plausibility checks.

                               END OF INSTRUCTIONS ON NOTAM

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     5.4 THE NOTAM CODE AND                          fifth letters denote its status of operation. The
          ABBREVIATIONS                              code identifying the subject or denoting its
                                                     status of operation is, whenever possible, self-
             5.4.1 Introduction                      evident. Where more than one subject could be
                                                     identified by the same self-evident code, the
The NOTAM Code is provided to enable the             most important subject is chosen.
coding of information regarding the
establishment, condition or change of radio If the subject of the NOTAM is not
aids, aerodromes and lighting facilities,            listed in the NOTAM Code, insert “XX” as the
dangers to aircraft, or search and rescue            second and third letters.
facilities. The NOTAM Code is a
comprehensive description of information    If the condition of the subject is not
contained in NOTAM. It serves as an                  listed in the NOTAM Code, insert “XX as the
important criteria for storage and retrieval of      fourth and fifth letters.
information, as well as for deciding whether
an item is of operational significance or not. It When a NOTAM is issued containing
also establishes the relevance of the NOTAM          a checklist of valid NOTAM, use KKKK as
to the various types of flight operations and        the second, third, fourth and fifth letters. When
determines whether it must therefore be part of      a NOTAM containing operationally significant
a pre-flight information bulletin. In addition, it   information is issued in accordance with
assists in specifying those items which are          AIRAC – Chapter 6 of the manual and when it
subject to immediate notification processes.         is used to announce the existence of AIRAC
The NOTAM Code also standardizes the                 AIP Supplements (trigger NOTAM), insert
presentation of the related plain-language text      “TT” as the fourth and fifth letters.
required at Item E) of the NOTAM Format as
contained in 5.3. Thus, the NOTAM Code is                    5.4.4 Classification by subject
the basis for determination of the qualifiers                     (second and third letters)
(Qualifiers) line and the related text to appear Facilities,   services    and    other
in Item E) of the NOTAM Format.                      information which require coding have been
                                                     classified by subject into sections and
              5.4.2 Procedures                       subsections. The second letter of the code
                                                     group, which may be any letter of the alphabet
The textual format and contents of NOTAM             except Q, indicates the subject subsections as
are governed by 5.2 and 5.3. NOTAM shall be          follows:
distributed via the AFS.
                                                     AGA (Aerodromes)
             5.4.3 Composition
                                                     ....    LIGHTING facilities       --L
                                                     ....    MOVEMENT and landing area --M
                                                     ....    FACILITIES and services   --F All NOTAM Code groups contain a
                                                     COM (Communications)
total of five (5) letters. The first letter of the
code group is always the letter Q to indicate
                                                     ....    COMMUNICATION and                 --C
that it is a code abbreviation for use in the
                                                             radar facilities
composition of NOTAM. The letter Q has
                                                     ....    INSTRUMENT and
been chosen to avoid conflict with any
                                                             microwave landing systems         --I
assigned radio call sign.
                                                     ....    GNSS services                     --G
                                                     ....    terminal and en-route The second and third letters identify
                                                             NAVIGATION facilities             --N
the subject reported upon and the fourth and

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RAC (Rules of the Air and Air Traffic                      5.4.5 Significations/uniform
Services)                                                    abbreviated phraseology

....       AIRSPACE organization       --A The significations/approved uniform
....       air traffic and VOLMET                abbreviated phraseology assigned to NOTAM
           SERVICES                    --S       Code groups, as required for use in Item E) of
....       air traffic PROCEDURES      --P       the NOTAM Format part 5.3, are to be
                                                 amplified or completed where necessary by the
Navigation Warnings                              addition of appropriate location indicators,
                                                 name of station, geographical coordinates,
....       airspace RESTRICTIONS       --R       abbreviations, frequencies, call signs, figures
....       WARNINGS                    --W       and plain language. ICAO abbreviations are to
                                                 be used in preference to plain language
Other information                                wherever possible. In order to facilitate the
                                                 dissemination of NOTAM by reducing the
....       OTHER information           --O       transmission time over telecommunication
                                                 channels, eliminate translation and provide a
Classification by status (fourth and fifth       suitable pre-flight information bulletin entry,
letters)                                         the approved uniform abbreviated phraseology
                                                 assigned to each signification of a two-letter The fourth letter of the code group,     combination in the NOTAM Code – Decode
which may be any letter of the alphabet except   part is to be used in preference to
Q, indicates status subsections as follows:      significations wherever possible.

A          AVAILABILITY                                     5.4.6 Text in parentheses

C          CHANGES                               The information necessary to complete a
                                                 signification/uniform abbreviated phraseology,
H          HAZARD conditions                     as indicated between parentheses, shall be
                                                 given as applicable.
                                                      5.4.7 Amplification of significations/
XX         Other                                        uniform abbreviated phraseology The following fourth and fifth letters The following is applicable to
of the NOTAM Code should be used in              amplification    of     significations/uniform
NOTAM cancellations:                             abbreviated phraseology:

AK:        RESUMED NORMAL OPERATION              a)     amplifications         relating         to
AL:        OPERATIVE (OR REOPERATIVE)                   significations/uniform        abbreviated
           SUBJECT TO PREVIOUSLY                        phraseology of the second and third
           PUBLISHED LIMITATIONS/                       letters (subject of the NOTAM) must
           CONDITIONS                                   precede             signification/uniform
AO:        OPERATIONAL                                  abbreviated phraseology of the NOTAM
CC:        COMPLETED                                    Code;
                                                 b)     amplifications          relating        to
                                                        significations/uniform         abbreviated
                                                        phraseology of the fourth and fifth
                                                        letters (status of operation) must follow

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       signification/uniform    abbreviated      SECOND AND THIRD LETTERS
       phraseology of the NOTAM Code.
                                                 The appropriate combination of two letters
Examples (as applicable to Item E) of the        selected from the “Second and Third Letters”
NOTAM Format)                                    section of the NOTAM Code to identify the
                                                 facility, service or danger to aircraft being
a)     The touchdown zone lights of RWY 27       reported upon (See, and
       are not available due to power failure.

       E) RWY 27 RTZL NOT AVBL                   FOURTH AND FIFTH LETTERS
                                                 The appropriate combination of two letters
                                                 selected from the “Fourth and Fifth Letters”
b)     The taxiway edge lights of taxiway B      section of the NOTAM Code to denote the
       are obscured by snow.                     status of operation of the facility, service or
                                                 danger to aircraft reported upon. (See,
       E) TWY B EDGE LGT OBSCURED       and
          BY SN
c)     On the strip of RWY 09/27 snow banks
       to a height of 15 ft. exist.              Note. – In the examples of NOTAM below, the
                                                 letters Q to G inclusive, each followed by a
       E) RWY 09/27 STRIP SN                     closing parenthesis, identify an item in the
          BANKS HGT 15 FT.                       NOTAM Format.

d)     The minimum sector altitude in the        a) The distance measuring equipment
       sector 900 to 1800 inbound VOR ident         (DME), at Delhi/IGI, will not be available
       DPN changed to 3 600 ft. MSL.                from the 31st day of March 2004 at 2359
                                                    UTC until the 1st day of April 2004 at
       E) 90 TO 180 DEG INBD VOR                    0600 UTC.
          DPN MSA CHANGED 3 600 FT.
          MSL.                                   NOTAM:

     5.4.8 Use of NOTAM Code groups              Q) VIDF/QNDAU/IV/BO/AE/…
                                                 A) VIDP B)0403312359 C) 0404010600 Five-letter NOTAM Code groups are        E) DME NOT AVBL
to be used in conjunction with the NOTAM
Format. They also constitute the basis for       Meaning of NOTAM:
determination of the qualifiers Traffic,
Purpose and Scope. Both NOTAM Code               Item Q):
groups and NOTAM qualifiers are to be
inserted in Q (Qualifiers) line of the NOTAM     -     VIDF:      ICAO      location    indicator
Format.                                                identifying Delhi FIR in which the
                                                       facility reported on is located; Five-letter NOTAM Code groups are
formed in the following manner:                  -     QNDAU: The letter “Q” identifies the
                                                       five-letter code group as the NOTAM
FIRST LETTER                                           Code group. Second and third letters
                                                       “ND” identifying “distance measuring
     The letter Q (See                        equipment” and fourth and fifth letters

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         “AU” denoting that the facility is “not          112.5 MHz at Kolkata/NSCBI will be out
         available”;                                      of service until approximately the 13th day
                                                          of November 2004 at 0900 UTC.
-        IV: Letters identifying that the
         information affects both IFR and VFR          NOTAM:
                                                       Q) VECF/QNVAS/IV/BO/AE/…
-        BO: Letters identifying that NOTAM is         A) VECC B)0411020615 C)0411130900 EST
         selected for pre-flight information           E) 112.5 MHZ VOR U/S
         bulletins entry and that it is
         operationally significant information for     Note. – In the above example, the
         IFR flights;                                  amplification (i.e. VOR frequency 112.5 MHz)
                                                       relating to the second and third letters
-        AE: Letters identifying that facility is      precedes the NOTAM Code significations.
         serving a dual purpose as terminal and
         en-route aid.                                 c) Runway 30 at Chennai airport is
                                                          permanently closed for VFR operations.

Item A):                                               NOTAM:

-        VIDP: ICAO            location indicator      Q) VOMF/QMRLV/V/NB/A/…
         identifying Delhi/IGI, the location of the    A) VOMM B)0410221430 C) PERM
         facility being reported on.                   E) RWY 30 CLSD TO VFR OPS

Item B):                                               d) In the Montreal FIR, gunfiring will take
                                                          place on the 21st day of February 2004
-        0403312359: Date/time group beginning            from 0800 UTC until 1100 UTC within an
         of period of validity in which the facility      area of 10 NM radius around the location
         is not available.                                45037’ North, 74000’ West from the
                                                          surface up to an altitude of 6 100m
Item C):                                                  (20 000 ft) MSL.

-        0404010600: Date/time group of the end        NOTAM:
         of the period of validity in which the
         facility is not available.                    Q) CZUL/QWMLW/IV/BO/W/000/200/
Item E):                                               A) CZUL B) 0402210800 C) 0402211100
                                                       E) GUN FRNG WILL TAKE PLACE
-        DME NOT AVBL: Plain-language entry               RADIUS 10 NM AROUND
         using ICAO abbreviations.                        4537N07400W
                                                       F) SFC G)6100 M (20000 FT) MSL
b) With immediate effect, the VHF
   omnidirectional radio range on frequency

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                           5.4.9 THE NOTAM CODE - DECODE
                      SECOND AND THIRD LETTERS

Code                             Signification                              Uniform abbreviated

Lighting facilities (L)

LA      Approach lighting system (specify runway and type)                      als
LB      Aerodrome beacon                                                        abn
LC      Runway center line lights (specify runway)                              rcll
LD      Landing direction indicator lights                                      Idi Igt
LE      Runway edge lights (specify runway)                                     redl
LF      Sequenced flashing lights (specify runway)                              sequenced flg lgt
LH      High intensity runway lights (specify runway)                           high intst rwy lgt
LI      Runway end identifier lights (specify runway)                           rwy end id lgt
LJ      Runway alignment indicator lights (specify runway)                      rai lgt
LK      Category II components of approach lighting system (specify runway)     cat II components als
LL      Low intensity runway lights (specify runway)                            low intst rwy lgt
LM      Medium intensity runway lights (specify runway)                         medium intst rwy lgt
LP      Precision approach path indicator (specify runway)                      papi
LR      All landing area lighting facilities                                    ldg area lgt fac
LS      Stopway lights (specify runway)                                         stwl
LT      Threshold lights (specify runway)                                       thr lgt
LU      Helicopter approach path indicator                                      hapi
LV      Visual approach slope indicator system (specify type and runway)        vasis
LW      Heliport lighting                                                       heliport lgt
LX      Taxiway center line lights (specify taxiway)                            twy cl lgt
LY      Taxiway edge lights (specify taxiway)                                   twy edge lgt
LZ      Runway touchdown zone lights (specify runway)                           rtzl

Movement and landing area (M)

MA      Movement area                                                           mov area
MB      Bearing strength (specify part of landing area or movement area)        bearing strength
MC      Clearway (specify runway)                                               cwy
MD      Declared distances (specify runway)                                     declared dist
MG      Taxiing guidance system                                                 tgs
MH      Runway arresting gear (specify runway)                                  rag
MK      Parking area                                                            prkg area
MM      Daylight markings (specify threshold, center line, etc.)                day markings
MN      Apron                                                                   apron
MP      Aircraft stands (specify)                                               acft stand
MR      Runway (specify runway)                                                 rwy
MS      Stopway (specify runway)                                                swy
MT      Threshold (specify runway)                                              thr

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Code                           Signification                                Uniform abbreviated

MU      Runway turning bay (specify runway)                                     rwy turning bay
MW      Strip (specify runway)                                                  strip
MX      Taxiway(s) (specify)                                                    twy

Facilities and services (F)

FA      Aerodrome                                                                ad
FB      Friction measuring device (specify type)                            friction measuring device
FC      Ceiling measurement equipment                                       ceiling measurement eqpt
FD      Docking system (specify AGNIS, BOLDS, etc.)                              dckg system
FE      Oxygen (specify type)                                                    oxygen
FF      Firefighting and rescue                                                  fire and rescue
FG      Ground movement control                                                  gnd mov ctl
FH      Helicopter alighting area/platform                                       hel alighting area
FJ      Oils (specify type)                                                      oil
FL      Landing direction indicator                                              ldi
FM      Meteorological service (specify type)                                    met
FO      Fog dispersal system                                                     fg dispersal
FP      Heliport                                                                 heliport
FS      Snow removal equipment                                                   sn removal eqpt
FT      Transmissometer (specify runway and, where applicable,
        designator(s) of transmissometer(s)                                     transmissometer
FU      Fuel availability                                                       fuel avbl
FW      Wind direction indicator                                                wdi
FZ      Customs                                                                 cust

Communications and surveillance facilities (C)

CA      Air/ground facility (specify service and frequency)                     a/g fac
CD      Controller-pilot data link communications and automatic
        dependent surveillance (specify application)                            cpdlc/ads
CE      En-route surveillance radar                                             rsr
CG      Ground controlled approach system                                       gca
CL      Selective calling system                                                selcal
CM      Surface movement radar                                                  smr
CP      Precision approach radar (specify runway)                               par
CR      Surveillance radar element of precision approach radar system
        (specify wavelength)                                                    sre
CS      Secondary surveillance radar                                            ssr
CT      Terminal area surveillance radar                                        tar

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Code                            Signification                                  Uniform abbreviated

GNSS services (G)

GA      GNSS airfield-specific operations (specify operation)                      gnss airfield
GW      GNSS area -wide operations (specify operation)                             gnss area

Instrument and microwave landing system (I)

IC      Instrument landing system (specify runway)                                 ils
ID      DME associated with ILS                                                    ils dme
IG      Glide path (ILS) (specify runway)                                          ils gp
II      Inner Marker (ILS) (specify runway)                                        ils im
IL      Localizer (ILS) (specify runway)                                           ils llz
IM      Middle marker (ILS) (specify runway)                                       ils mm
IN      Localizer (not associated with ILS)                                        llz
IO      Outer marker (ILS) (specify runway)                                        ils om
IS      ILS Category I (specify runway)                                            ils cat I
IT      ILS Category II (specify runway)                                           ils cat II
IU      ILS Category III (specify runway)                                          ils cat III
IW      Microwave landing system (specify runway)                                  mls
IX      Locator, outer (ILS) (specify runway)                                      ils lo
IY      Locator, middle (ILS) (specify runway)                                     ils lm

Terminal and en-route navigation facilities (N)

NA      All radio navigation facilities (except …)                                 all rdo nav fac
NB      Non-directional radio beacon                                               ndb
NC      DECCA                                                                      decca
ND      Distance measuring equipment                                               dme
NF      Fan marker                                                                 fan mkr
NL      Locator (specify identification)                                           l
NM      VOR/DME                                                                    vor/dme
NN      TACAN                                                                      tacan
NO      OMEGA                                                                      omega
NT      VORTAC                                                                     vortac
NV      VOR                                                                        vor
NX      Direction-finding station (specify type and frequency)                     df

Airspace organization (A)

AA      Minimum altitude (specify en-route/crossing/safe)                          mnm alt
AC      Control zone                                                               ctr

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Code                            Signification                                Uniform abbreviated

AD      Air defence identification zone                                          adiz
AE      Control area                                                             cta
AF      Flight information region                                                fir
AH      Upper control area                                                       uta
AL      Minimum usable flight level                                              mnm usable fl
AN      Area navigation route                                                    rnav rte
AO      Oceanic control area                                                     oca
AP      Reporting point (specify name or coded designator)                       rep
AR      ATS route (specify)                                                      ats rte
AT      Terminal control area                                                    tma
AU      Upper flight information region                                          uir
AV      Upper advisory area                                                      uda
AX      Intersection                                                             int
AZ      Aerodrome traffic zone                                                   atz

Air Traffic and VOLMET services (S)

SA      Automatic terminal information service                                   atis
SB      ATS reporting office                                                     aro
SC      Area control center                                                      acc
SE      Flight information service                                               fis
SF      Aerodrome flight information service                                     afis
SL      Flow control center                                                      flow ctl centre
SO      Oceanic area control center                                              oac
SP      Approach control service                                                 app
SS      Flight service station                                                   fss
ST      Aerodrome control tower                                                  twr
SU      Upper area control center                                                uac
SV      VOLMET broadcast                                                         volmet
SY      Upper advisory service (specify)                                         upper advisory ser

Air traffic procedures (P)

PA      Standard instrument arrival (specify route designator)                   star
PB      Standard VFR arrival                                                     std vfr arr
PD      Standard instrument departure (specify route designator)                 sid
PE      Standard VFR departure                                                   std vfr dep
PF      Flow control procedure                                                   flow ctl proc
PH      Holding procedure                                                        hldg proc
PI      Instrument approach procedure (specify type of runway)                   instr apch proc
PK      VFR approach procedure                                                   vfr apch proc

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Code                            Signification                                   Uniform abbreviated

PM      Aerodrome operating minima (specify procedure and amended
        minimum)                                                                    opr minima
PO      Obstacle clearance altitude (specify procedure)                             oca
PP      Obstacle clearance height (specify procedure)                               och
PR      Radio failure procedure                                                     rdo failure proc
PT      Transition altitude                                                         ta
PU      Missed approach procedure (specify runway)                                  missed apch proc
PX      Minimum holding altitude (specify fix)                                      mnm hldg alt
PZ      ADIZ procedure                                                              adiz proc

Navigation Warnings
Airspace restrictions (R)

RA      Airspace reservation (specify)                                              airspace reservation
RD      Danger area (specify national prefix and number)                            .. d ..
RM      Military operating area                                                     moa
RO      Overflying of …. (specify)                                                  overflying
RP      Prohibited area (specify national prefix and number)                        .. p ..
RR      Restricted area (specify national prefix and number)                        .. r ..
RT      Temporary restricted area (specify area)                                    tempo restricted area

Navigation Warnings
Warnings (W)

WA      Air display                                                                 air display
WB      Aerobatics                                                                  aerobatics
WC      Captive balloon or kite                                                     captive balloon/kite
WD      Demolition of explosives                                                    demolition of explosives
WE      Exercises (specify)                                                         exer
WF      Air refueling                                                               air refueling
WG      Glider flying                                                               gld fly
WJ      Banner/target towing                                                        banner/target towing
WL      Ascent of free balloon                                                      ascent of free balloon
WM      Missile, gun or rocket firing                                               missile/gun/rocket/frng
WP      Parachute jumping exercise                                                  pje
WR      Radioactive materials or toxic chemicals (specify)                          radioactive materials/
                                                                                    toxic chemicals
WS      Burning or blowing gas                                                      burning/blowing gas
WT      Mass movement of aircraft                                                   mass mov of acft
WV      Formation flight                                                            formation flt.

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Code                             Signification                               Uniform abbreviated

WW      significant volcanic activity                                            significant
                                                                                 volcanic act
WZ      Model flying                                                             model fly

Other Information (O)

OA      Aeronautical information service                                         ais
OB      Obstacle (specify details)                                               obst
OE      Aircraft entry requirements                                              acft entry rqmnts
OL      Obstacle lights on …. (specify)                                          obst lgt
OR      Rescue coordination center                                               rcc

                      FOURTH AND FIFTH LETTERS

Code                             Signification                               Uniform abbreviated

Availability (A)

AC      Withdrawn for maintenance                                                withdrawn maint
AD      Available for daylight operation                                         avbl day ops
AF      Flight checked and found reliable                                        fltck okay
AG      Operating but ground checked only, awaiting flight check                 opr but gnd ck
                                                                                 Only, awaiting fltck
AH      Hours of service are now … (specify)                                     hr ser
AK      resumed normal operation                                                 okay
AL      Operative (or reoperative) subject to previously published               opr subj
        Limitations/conditions                                                   previous cond
AM      Military operations only                                                 mil ops only
AN      Available for night operation                                            avbl ngt ops
AO      Operational                                                              opr
AP      Available, prior permission required                                     avbl, ppr
AR      Available on request                                                     avbl o/r
AS      Unserviceable                                                            u/s
AU      Not available (specify reason if appropriate)                            not avbl
AW      Completely withdrawn                                                     withdrawn
AX      Previously promulgated shutdown has been cancelled                       promulgated
                                                                                 shutdown cnl

Changes (C)

CA      Activated                                                                act

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Code                             Signification                                Uniform abbreviated

CC      Completed                                                                 cmpl
CD      Deactivated                                                               deactivated
CE      Erected                                                                   erected
CF      Operating frequency(ies) changed to                                       opr freq changed to
CG      Downgraded to                                                             downgraded to
CH      Changed                                                                   changed
CI      Identification or radio call sign changed to                              ident/rdo call
                                                                                  sign changed to
CL      Realigned                                                                 realigned
CM      Displaced                                                                 displaced
CN      Cancelled                                                                 cnl
CO      Operating                                                                 opr
CP      Operating on reduced power                                                opr reduced pwr
CR      Temporarily replaced by                                                   tempo rplcd by
CS      Installed                                                                 instl
CT      On test, do not use                                                       on test, do not use

Hazard Conditions (H)

HA      Braking action is …
        1) Poor
        2) Medium/Poor
        3) Medium
        4) Medium/Good
        5) Good                                                                   ba is…
HB      Friction coefficient is … (specify friction measuring device used)        friction coefficient is
HC      Covered by compacted snow to a depth of                                   cov compacted
                                                                                  sn depth
HD      Covered by dry snow to a depth of                                         cov dry sn depth
HE      Covered by water to a depth of                                            cov water depth
HF      Totally free of snow and ice                                              free of sn and ice
HG      Grass cutting in progress                                                 grass cutting inpr
HH      Hazard due to (specify)                                                   hazard due
HI      Covered by ice                                                            cov ice
HJ      Launch planned … (specify balloon flight identification or project
        code name, launch site, planned period of launch(es) – date/time,
        expected climb direction, estimated time to pass 18 000 m (60 000 ft),
        or reaching cruise level if at or below 18 000 m (60 000 ft),
        together with estimated location)                                         launch plan
HK      Bird migration in progress (specify direction)                            bird migration inpr
HL      Snow clearance completed                                                  sn clr cmpl
HM      Marked by                                                                 marked by
HN      Covered by wet snow or slush to a depth of                                cov wet sn/slush depth
HO      Obscured by snow                                                          obscured by sn
HP      Snow clearance in progress                                                sn clr inpr

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Code                            Signification                                 Uniform abbreviated

HQ      Operation cancelled … (specify balloon flight identification or
        project code name)                                                        opr cnl
HR      Standing water                                                            standing water
HS      Sanding in progress                                                       sanding inpr
HT      Approach according to signal area only                                    apch according signal
HU      Launch in progress … (specify balloon flight identification or project
        code name, launch site, date/time of launch(es), estimated time
        passing 18 000 m (60 000 ft), or reaching cruising level if at or
        below 18 000 m (60 000 ft), together with estimated location,
        estimated date/time of termination of the flight and planned
        location of ground contact, when applicable)                              launch inpr
HV      Work completed                                                            work cmpl
HW      Work in progress                                                          wip
HX      Concentration of birds                                                    bird concentration
HY      Snow banks exist (specify height)                                         sn banks hgt
HZ      Covered by frozen ruts and ridges                                         cov frozen ruts and

Limitation (L)

LA      Operating on auxiliary power supply                                       opr aux pwr
LB      Reserved for aircraft based therein                                       reserved for acft
                                                                                  based therein
LC      Closed                                                                    clsd
LD      Unsafe                                                                    unsafe
LE      Operating without auxiliary power supply                                  opr aux wo pwr
LF      Interference from                                                         interference fm
LG      Operating without identification                                          opr wo ident
LH      Unserviceable for aircraft heavier than                                   u/s acft heavier than
LI      Closed to IFR operations                                                  clsd ifr ops
LK      Operating as a fixed light                                                opr as f lgt
LL      Usable for length of … and width of …                                     usable len…/wid…
LN      Closed to all night operation                                             clsd to all ngt ops
LP      Prohibited to                                                             prohibited to
LR      Aircraft restricted to runways and taxiways                               acft restricted to
                                                                                  rwy and twy
LS      subject to interruption                                                   subj intrp
LT      Limited to                                                                ltd to
LV      Closed to VFR operations                                                  clsd vfr ops
LW      Will take place                                                           will take place
LX      Operating but caution advised due to                                      opr but ctn advised
                                                                                  due to

Other (XX)

XX      Plain language

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5.5 TRIGGER NOTAM                                        5.5.4 Trigger NOTAM are issued in accordance
                                                         with the same instructions as for any other
5.5.1 The intent of this NOTAM is to serve as a          NOTAM. In this respect the following apply:
reminder in the pre-flight information bulletin
(PIB) for the forthcoming operationally significant      Qualifiers (Item Q))
change in AIP (via AIP supplement), if applicable.
When an AIP Supplement is published in                   NOTAM CODE
accordance with AIRAC procedures, a trigger
NOTAM must be originated giving a brief                  The second and third letters (subject) must be
description of the contents, the effective date/time     selected from 5.4.4 & 5.4.9 and must never be
and the serial number of the AIP Supplement.             XX.
This NOTAM must come into force on the same
date as the supplement to which it refers. The text      The fourth and fifth letters (condition) must
of the trigger NOTAM is included in the PIB to           always contain TT as the fourth and fifth letters.
ensure that pilots and operators are reminded that
changes of operational significance will take place          Note. – Condition “TT” can be used to
as of a given effective date.                            retrieve specific trigger NOTAM from any issuing
                                                         NOF and can also be used to include (or exclude)
5.5.2 Information         concerning        any          trigger NOTAM for the PIB at a specific time
circumstances listed in chapter 6, must be               before their effective date.
distributed using AIRAC procedures as an AIRAC
AIP Supplement.                                          PURPOSE

5.5.3    Trigger NOTAM are issued:                       As trigger NOTAM are issued only relative to
                                                         information of operational significance, the
    a)   on the publication date of AIP                  qualifier PURPOSE must relate to at least N
         Supplement (AIRAC or, in exceptional            (NOTAM selected for immediate attention of
         cases, non-AIRAC);                              aircraft operators) or O (NOTAM concerning
                                                         flight operations), and B (NOTAM selected for
    b) in the appropriate NOTAM series,                  PIB entry).
       according to the information it contains;
                                                         Item E)
             Note. – Trigger NOTAM are never
         published in Series T which is reserved         The text in Item E) should not exceed 300
         for NOTAM Processing Units in cases             characters and must always start with the words
         when basic operational information was          “TRIGGER NOTAM”, followed by a reference to
         not “triggered” by the issuing NOF.             the published AIRAC Supplement concerned.

    c)   for a single location (FIR or aerodrome)        Example
         only, but may include information on
         different subjects related to the location in   Q) VIDF/QPDTT/IV/OB/E/000/2834N07706E999
         order to reduce the number of NOTAM to          A) VIDP
         be published;                                   E) TRIGGER NOTAM – AIP SUP11/03 NEW
            Note. – In the case of multiple subjects,
         the qualifiers TRAFFIC, PURPOSE and             Trigger NOTAM relative to AIP Supplements
         SCOPE must be filled in according to the        (AIRAC and non-AIRAC)
         subject of highest operational importance.

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5.5.5 Due to time constraints, AIP Supplements         possible. However, special care should be taken
containing information to be published using           that the begin date/time (Item B) and the end
AIRAC procedures are sometimes published as            date/time (Item C) sufficiently cover the
non-AIRAC AIP Supplements. Trigger NOTAM               operational needs imposed for the display of the
must be issued for all Supplements containing          information in PIB.
such information (AIRAC and non-AIRAC).
                                                       Cancellation by NOTAM of AIP Supplements AIP Supplements become effective at the        containing AIRAC information
date stated in the supplement. Information to be
published using AIRAC procedures does not              5.5.6 For these AIP Supplements, an associated
always start on an AIRAC cycle date (major             trigger NOTAM would have been issued and the
works, large air exercises, etc.). Consequently,       procedures for cancellation/replacement of trigger
both the AIP Supplement and the trigger NOTAM          NOTAM apply.
must contain the effective date/time of the start of
the information.                                       Cancellation by NOTAM of AIP Supplements
                                                       containing non-AIRAC information AIP Supplements normally contain
information of a temporary nature, the duration of     5.5.7 For these AIP Supplements, normally no
the validity of which is known or unknown (“until      trigger NOTAM would have been issued. In case
approximately”). AIP Supplements of unknown            of cancellation before the end of their validity, a
duration must be replaced in due time by another       NOTAN may be issued. Such NOTAM must
supplement and a corresponding trigger                 always contain the PURPOSE qualifier “M”
NOTAMR, or must be replaced by a NOTAMR,               (Miscellaneous NOTAM) and must remain in
or cancelled by a NOTAMC. The validity of              force for 24 hours in order to allow recipients to
trigger NOTAM relative to AIP Supplements of           remove the cancelled data from the AIP.
unknown duration must be described by a ten-
digit date-time group followed by EST                  Replacement of NOTAM by an AIP Supplement
(cancellation or replacement required). The
validity of trigger NOTAM relative to AIP              5.5.8 Publication of an AIP Supplement to
Supplements of a known duration must be the            replace and modify information of an existing
entire duration of the supplement (i.e. Item B)        NOTAM may occur at any time. A trigger
contains the effective date/time and Item C) the       NOTAM must be published against this AIP
end date of the supplement). The NOTAM stays           Supplement. The issuing NOF must ensure that
in the PIB for the entire duration of the              the existing NOTAM is cancelled at the date/time
supplement.                                            of the trigger NOTAM. Depending on the case,
                                                       this may be done with a NOTAMR or with a
Example:                                               NOTAMC.

Q) VOMF/QNMTT/IV/BO/AE/000/999                         Cancellation/Replacement of trigger NOTAM
A) VOMD B)0507070001 C)0507210001
E) TRIGGER NOTAM PERM. AIRAC AIP                       5.5.9 Basic cancellation rules for NOTAM
SUPP   20/2005  ON    VOR/VOR     DME                  apply. Trigger NOTAM relative to AIRAC AIP
PROCEDURE RWY 27 MADURAI AIRPORT)                      Amendments must be self-canceling 14 days after
                                                       the effective date of the amendment. Trigger Any change to an AIRAC AIP                     NOTAM relative to AIP Supplements must be
Supplement, especially in connection with a            cancelled according to the following:
trigger NOTAM, must be published by the issuing
NOF in a way that the information is always clear          a) If Item C) is a fixed date, the trigger
and without any ambiguities. Detailed procedures              NOTAM will be automatically cancelled
for such cases are not given here because of the              on this date. Exceptionally, the end date
great variety and complexity of the circumstances             specified in the AIP Supplement may be

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        brought forward by NOTAM. In this case,
        at the date of cancellation (new end of
        validity), a trigger NOTAMR is issued
        that remains in force a maximum of 14
        days. It can be in force less than 14 days if
        the originally published end of validity of
        the supplement is reached within this 14-
        day period. In this case, the Item C) date
        of the trigger NOTAMR must be identical
        to the end of validity date of the
        supplement. The text in Item E) must
        clearly indicate that the planned end date
        has been brought forward.


A0034/03 NOTAMN
Q) ESMM/QFATT/IV/OB/A/000/999/                          b) If Item C) is an estimated date (EST), a
5739N01217E005                                             trigger NOTAMR must be published to
A) ESGG B)0304170001 C)0309042400                          replace the existing trigger NOTAM at the
E) TRIGGER NOTAM – AIRAC AIP SUP 14/03                     appropriate time (i.e. before the Item C)
USE OF AERODROME RESTRICTED DUE TO                         time has been reached). Such trigger
MAJOR CONSTRUCTION WORK.                                   NOTAMR must follow the same rules for
                                                           origination as explained above. Trigger
A0126/03 NOTAMR A0034/03                                   NOTAM with an estimated end date must
Q) ESMM/QFATT/IV/OB/A/000/999/                             be cancelled by the publication of a
5739N01217E005                                             normal NOTAMC at the appropriate time
A) ESGG B)0309040001 C)0310302400                          (i.e. the time at which the issuing NOF is
E) REF AIRAC AIP SUP 14/03 WORK HAS                        informed that the situation described in
BEEN COMPLETED. THE RESTRICTIONS                           the AIP Supplement has ended).

January, 2006                                                                           5 - 24
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                                                  SNOWTAM                     FORMAT
                    (PRIORITY              (ADDRESSES)
    (COM            INDICATOR)                                                                                                     ⇚
   heading)         (DATE AND TIME                                (ORIGINATOR’S
                     OF FILING)                                    INDICATOR)
                    (SWAA* SERIAL NUMBER)                         (LOCATION               DATE/TIME OF OBSERVATION          (OPTIONAL
 (Abbreviated                                                     INDICATOR)                                                GROUP)

                    S    W     *     *                                                                                                  ⇚(

     SNOWTAM                   (Serial Number)
(AERODROME LOCATION INDICATOR)                                                                                       A)
(DATE/TIME OF OBSERVATION (Time of completion of measurement in UTC))                                                B)
(RUNWAY DESIGNATORS)                                                                                                 C)
(CLEARED RUNWAY LENGTH, IF LESS THAN PUBLISHED LENGTH (m))                                                           D)
(CLEARED RUNWAY WIDTH, IF LESS THAN PUBLISHED WIDTH (m; if offset left or right of centre line                       E)
add “L” or “R”))
(DEPOSITS OVER TOTAL RUNWAY LENGTH                                                                                   F)
(Observed on each third of the runway, starting from threshold having the lower runway designation number)
1 – DAMP
2 – WET or water patches
3 – RIME OR FROST COVERED (depth normally less than 1 mm)
7 – ICE
(MEAN DEPTH (mm) FOR EACH THIRD OF TOTAL RUNWAY LENGTH)                                                              G)

             0.40 and above                                         GOOD                - 5
             0..39 to 0.36                                          MEDIUM/GOOD - 4
             0..35 to 0.30                                          MEDIUM              - 3
             0.29 to 0.26                                           MEDIUM/POOR - 2
             0.25 and below                                         POOR               -   1
             0 – unreliable                                         UNRELIABLE         -   9
(When quoting a measured coefficient, use the observed two figures, followed by the abbreviation of the friction
measuring device used. When quoting an estimate, use single digit))
(CRITICAL SNOWBANKS (if present, insert height (cm)/distance from the edge of runway (m) followed by                 J)
“L”, “R” or “LR” if applicable)
(RUNWAY LIGHTS (f obscured, insert “YES” followed by “L”, “R” or both “LR” if applicable))                           K)
(FURTHER CLEARANCE (if planned, insert length (m)/width (m) to be cleared or if to full dimensions,                  L)
insert “TOTAL”))
(FURTHER CLEARANCE EXPECTED TO BE COMPLETED BY …. (UTC))                                                             M)
(TAXIWAY (if no appropriate taxiway is available, insert “NO”))                                                      N)
(TAXIWAY SNOWBANKS (if more than 60 cm, insert “YES” followed by distance apart, m))                                 P)
(APRON (if unusable insert “NO”))                                                                                    R)
(NEXT PLANNED OBSERVATION/MEASUREMENT IS FOR) (month/day/hour in UTC)                                                S)
(PLAIN-LANGUAGE REMARKS (including contaminant coverage and other operationally significant                          T)                 )⇚
information, e.g. sanding, de-icing))
NOTE: 1. *Enter ICAO nationality letters as given in ICAO Doc 7910, Part 2.
         2. Information on other runways, repeat from C to P.
         3. Words in brackets ( ) not to be transmitted.

 SIGNATURE OF ORIGINATOR (not for transmission)

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5.6.1   General
                                                         5) when critical snow banks exist on
A special series of NOTAM, named                            one or both sides of the runway,
SNOWTAM is used to notify the presence or                   any change in the height or
removal of hazards conditions on the                        distance from center line;
movement area due to snow, slush, ice or
water associated with these conditions. When             6) any change in the conspicuity of
the SNOWTAM Format is used, the                             runway lighting caused by
information must be given in the order shown                obscuring of the lights;
in the format.
                                                         7) any other conditions known to be
    a) When reporting on two or three                       significant     according       to
       runways, repeat Items C to P                         experience or local circumstances.
                                                    e) The abbreviated heading ‘TTAAiiii
    b) Items together with their indicator             CCCC      MMYYGGgg (BBB)” is
       must be dropped completely, where               included to facilitate the automatic
       no information is to be included.               processing of SNOWTAM messages
                                                       in computer data banks. The
    c) Metric units must be used and the unit          explanation of these symbols is:
       of measurement not reported.
                                                        TT = data           designator    for
    d) The      maximum        validity of                   SNOWTAM = SW;
       SNOWTAM is 24 hours. New                         AA = geographical designator for
       SNOWTAM must be issued whenever                       States, e.g. LF = FRANCE, EG =
       there is a significant change in                      United Kingdom (see Location
       conditions. The following changes                     Indicators (Doc 7910), Part 2,
       relating to runway conditions are                     Index to Nationality Letters for
       considered as significant:                            Location Indicators);
                                                        iiii = SNOWTAM serial number in
        1) a change in the coefficient of                    a four-figure group;
           friction of about 0.05;                      CCCC = four-letter location indicator
                                                             of the aerodrome to which the
        2) changes in depth of deposit                       SNOWTAM refers (see Location
           greater than the following: 20 mm                 Indicators (Doc 7910));
           for dry snow, 10 mm for wet                  MMYYGGgg           =    date/time   of
           snow, 3 mm for slush;                             observation/measurement,
        3) a change in the available length or               MM = month, e.g. January = 01,
           width of a runway of 10 per cent                      December = 12
           or more;                                          YY = day of the month
                                                             GGgg = time in hours (GG) and
        4) any change in the type of deposit                      minutes (gg) UTC;
           or extent of coverage which                  (BBB) = optional group for:
           requires reclassification in Items                Correction      to    SNOWTAM
           F or T of the SNOWTAM;                            message previously disseminated
                                                             with the same serial number =

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        Note.- Brackets in (BBB) are used to               Note. – Definitions for the various
            indicate that this group is optional           types of snow are given in 5.6.20 and
   Example:   Abbreviated    heading  of
SNOWTAM No. 149 from Zurich,                       5.6.8   Item G – Mean depth in milimetres
measurement/observation of 7 November at                   deposit for each third of total runway
0620 UTC:                                                  length, or “XX” if not measurable or
                                                           operationally not significant; the
        SWLS0149 LSZH 11070620                             assessment to be made to an accuracy
                                                           of 20 mm for dry snow, 10 mm for
5.6.2   Item A – Aerodrome location indicator              wet snow and 3 mm for slush.
        (four-letter location indicator).
                                                   5.6.9   Item H – Friction measurements on
5.6.3   Item B – eight-figure date/time group              each third of the runway and friction
        – giving time of observation as month,             measuring device. Measured or
        day, hour and minute in UTC; this                  calculated coefficient (two digits) or,
        item must always be completed.                     if not available, estimated surface
                                                           friction (single digit) in the order from
5.6.4   Item C – Lower runway designator                   the threshold having the lower runway
        number.                                            designation number. Insert a code 9
                                                           when surface conditions or available
5.6.5   Item D – Cleared runway length in                  friction measuring device do not
        metres, if less than published length              permit a reliable surface friction
        (see Item T on reporting on part of                measurement to be made. Use the
        runway not cleared).                               following abbreviations to indicate the
                                                           type of friction measuring device
5.6.6   Item E – Cleared runway width in                   used:
        metres, if less than published width; if
        offset left or right of center line, add           BRD     Brakemeter-Dynometer
        “L” or “R”, as viewed from the                     GRT     Grip tester
        threshold having the lower runway                  MUM     Mu-meter
        designation number.                                RFT     Runway friction tester
                                                           SFH     Surface friction tester
5.6.7   Item F – Deposit over total runway                        (high-pressure tire)
        length as explained in SNOWTAM                     SFL     Surface friction tester (low-
        Format. Suitable combinations of                           pressure tire)
        these numbers may be used to indicate              SKH     Skiddometer (high-
        varying conditions over runway                             pressure tire)
        segments. If more than one deposit is              SKL     Skiddometer (low-
        present on the same portion of the                         pressure tire)
        runway, they should be reported in                 TAP     Tapley meter
        sequence from the top to the bottom.
        Drifts, depths or deposit appreciably      If other equipment is used, specify in plain
        greater than the average values or         language.
        other significant characteristics of the
        deposits may be reported under Item T      5.6.10 Item J - Critical snowbanks. If present
        in plain language.                                insert height in centimeters and
                                                          distance from edge of runway in
                                                          metres followed by left (“L”) or right
                                                          (“R”) side or both sides (“LR”), as

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         viewed from the threshold having the      5.6.19 EXAMPLE OF COMPLETED
         lower runway designation number.                 SNOWTAM FORMAT

5.6.11 Item K – If runway lights are                      GG EHAMZQZX EDDFZQZX
       obscured, insert “YES” followed by                 EKCHZQZX 070645 LSZHYNYX
       “L”, “R” or both “LR”, as viewed                   SWLS0149 LSZH 11070620
       from the threshold having the lower                (SNOWTAM 0149
       runway designation number.                         A) LSZH B) 11070620 C) 02 D)… P)
                                                                           C) 09 D)… P)
5.6.12 Item L – When further clearance will                                C) 12 D)… P)
       be undertaken, enter length and width              R) NO S)11070920 T) DEICING)
       of runway or “TOTAL” if runway will
       be cleared to full dimensions.              5.6.20 Definitions of the various types of
5.6.13 Item M – Enter the anticipated time of
       completion in UTC.                                 Slush. Water-saturated snow which
                                                          with a heel-and-and-toe slap-down
5.6.14 Item N – The code for Item F may be                motion against the ground will be
       used to describe taxiway conditions;               displaced with a splatter; specific
       enter “NO” if no taxiways serving the              gravity: 0.5 up to 0.8.
       associated runway are available.
                                                       Note.- Combinations of ice, snow and/or
5.6.15 Item P – If applicable, enter “YES”         standing water may, especially when rain, rain
       followed by lateral distance in metres.     and snow, or snow is falling, produce
                                                   substances with specific gravities in excess
5.6.16 Item R – The code for Item F may be         of 0.8. These substances, due to their high
       used to describe apron conditions;          water/ice content, will have a transparent
       enter “NO” if the apron is unusable.        rather than a cloudy appearance and, at the
                                                   higher specific gravities, will be readily
5.6.17    Item S – Enter the anticipated time of   distinguishable from slush.
         next observation/measurement in
         UTC.                                      5.6.21 Snow (on the ground)

5.6.18 Item T – Describe in plain language            a) Dry snow. Snow which can be blown
       any       operationally      significant          if loose or, if compacted by hand, will
       information but always report on                  fall apart again upon release; specific
       length of uncleared runway (Item D)               gravity: up to but not including 0.35.
       and extent of runway contamination
       (Item F) for each third of the runway          b) Wet snow. Snow which, if compacted
       (if appropriate) in accordance with the           by hand, will stick together and tend to
       following scale:                                  or form a snowball; specific gravity:
                                                         0.35 up to but not including 0.5.
         Runway contamination – 10% - if less
            than 10% of runway contaminated           c) Compacted snow. Snow which has
         Runway contamination – 25% - if 11-             been compressed into a solid mass that
           25% of runway contaminated                    resists further compression and will
         Runway contamination – 50% - if 26-             hold together or break up into lumps if
           50% of runway contaminated                    picked up; specific gravity: 0.5 and
         Runway contamination – 100% - if                over.
           51-100% of runway contaminated.
                                                      END OF INSTRUCTIONS ON SNOWTAM

January, 2006                                                                         5 - 28
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                                        ASHTAM              FORMAT

               (PRIORITY            (ADDRESSEE INDICATOR(S))1
   (COM        INDICATOR)
               (DATE AND TIME                         (ORIGINATOR’S
                OF FILING)                             INDICATOR)

               (VA*2 SERIAL NUMBER)                   (LOCATION           DATE/TIME OF ISSUANCE                 (OPTIONAL
(Abbreviated                                          INDICATOR)                                                GROUP)

               V    A    *2    *2

                 ASHTAM                             (SERIAL NUMBER)

(FLIGHT INFORMATION REGION AFFECTED)                                                                            A)

(DATE/TIME (UTC) OF ERUPTION)                                                                                   B)

(VOLCANO NAME AND NUMBER)                                                                                       C)


(EXISTENCE AND HORIZONTAL/VERTICAL EXTENT OF VOLCANIC ASH CLOUD)4                                               F)

(DIRECTION OF MOVEMENT OF ASH CLOUD)4                                                                           G)

(AIR ROUTES FOR PORTIONS OF AIR ROUTES AND FLIGHT LEVELS AFFECTED)                                              H)


(SOURCE OF INFORMATION)                                                                                         J)

(PLAIN-LANGUAGE REMARKS)                                                                                        K)

1. *Enter ICAO nationality letter as given in ICAO Doc 7910, Part 2.
2. See paragraph
3. Advice on the existence, extent and movement of volcanic ash cloud G) and H) may be obtained from the Volcanic Ash Advisory
   Centre(s) responsible for the FIR concerned.
4. Item titles in brackets ( ) not to be transmitted.

SIGNATURE OF ORIGINATOR (not for transmission)

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5.7.1   General                                      ASHTAM should be issued initially with
                                                     items A) to E) indicated as “unknown”, and A special series of NOTAM called             items F) to K) completed, as necessary, based
ASHTAM, is used to notify an operationally           on the special air-report, pending receipt of
significant change in volcanic activity, the         further information. In other circumstances, if
location, date & time of volcanic eruption           information for a specific field A) to K) is not
and/or horizontal and vertical extent of             available indicate “NIL”.
volcanic ash clouds including direction of
movement, flight levels and routes or portions The maximum period of validity of
of route which could be affected. A special          ASHTAM is 24 hours. New ASHTAM must
Format is prescribed for this purpose. When          be issued whenever there is a change in the
the ASHTAM Format is used, the                       level of alert.
information must be given in the order shown
in the Format.                                       5.7.2   Abbreviated heading The ASHTAM provides information     Following     the     usual     AFTN
on the status of activity of a volcano when a        communications header, the abbreviated
change in its activity is, or is expected to be of   heading “TT Aaiiii CCCC MMYYGGgg
operational significance. This information is        (BBB)” is included to facilitate the automatic
provided using the volcano level of alert            processing of ASHTAM messages in
colour code given in below.                  computer data banks. The explanation of these
                                                     symbols is: In the event of a volcanic eruption
producing ash cloud of operational                     TT = data designation for ASHTAM = VA
significance, the ASHTAM also provides                 AA = geographical designator for States,
information on the location, extent and                   e.g. NZ = New Zealand (see Location
movement of the ash cloud and the air routes              Indicators (Doc 7910), Part 2, Index to
and flight levels affected.                               Nationality     Letters     of     Location
                                                          Indicators); Issuance of an ASHTAM giving                   iiii = ASHTAM serial number in a four-
information on a volcanic eruption, in                    figure group;
accordance with section 5.7.3 below, should            CCCC = four-letter location indicator of the
not be delayed until complete information A)              flight information region concerned (see
to K) is available but should be issued                   Location Indicators (Doc 7910), Part 5,
immediately following receipt of notification             addresses of centers in charge of FIR);
that an eruption has occurred or is expected to        MMYYGGgg = date/time of report,
occur, or a change in the status of activity of a         whereby:
volcano of operational significance has                MM = month, e.g. January = 01, December
occurred or is expected to occur, or an ash               = 12
cloud is reported. In the case of an expected          YY = date of the month
eruption, and hence no ash cloud evident at            GGgg = time in hours (GG) and minutes
that time, items A) to E) should be completed             (gg) UTC;
and items F) to I) indicated as “Not                   (BBB) = optional group for correction to an
applicable”. Similarly, if a volcanic ash cloud           ASHTAM           message         previously
is reported, e.g. by special air-report, but the          disseminated with the same serial number
source volcano is not known at that time, the             = COR.

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    Note. – Brackets in (BBB) are used to                       Manual of Volcanic Ash, Radioactive
  indicate that this group is optional                          Material and Toxic Chemical Clouds
    Example:      Abbreviated      heading of                   (Doc 9691), Appendix H, and on the
ASHTAM for Auckland Oceanic FIR, report                         World Map of Volcanoes and
on 7th November at 0620 UTC:                                    Principal Aeronautical Features).

        VANZ0001 NZZO 11070620                Item D – Latitude/Longitude of the
                                                               volcano in whole degrees or radial and
5.7.3   Content of ASHTAM                                      distance of volcano from NAVAID (as
                                                               listed in the ICAO Manual on Item A – Flight information region                     Volcanic Ash, Radioactive Material
affected, plain-language equivalent of the                     and Toxic Chemical Clouds (Doc
location indicator given in the abbreviated                    9691), Appendix H, and on the World
heading, in this example “Auckland Oceanic                     Map of Volcanoes and Principal
FIR”.                                                          Aeronautical Features). Item B – Date and time (UTC) of first
        eruption.                             Item E – Colour code for level of alert
                                                               indicating volcanic activity, including Item C – name of volcano, and number                   any previous level of alert colour code
        of volcano as listed in the ICAO                       as follow:

Level of alert
Colour code                              Status of activity of volcano

RED              Volcanic eruption in progress. Ash plume/cloud reported above FL 250.
                 Volcano dangerous, eruption likely, with ash plume/cloud expected to rise
                 above FL 250.

ORANGE           Volcanic eruption in progress but ash plume/cloud not reaching nor expected
ALERT            to reach FL 250.

                 Volcano dangerous, eruption likely but ash plume/cloud not expected to
                 reach FL 250.

YELLOW           Volcano known to be active from time to time and volcanic activity has recently
ALERT            increased significantly, volcano not currently considered dangerous but caution
                 should be exercised.

                 (After an eruption, i.e. change in alert to yellow from red or orange.) Volcanic
                 activity has decreased significantly, volcano not currently considered dangerous
                 but caution should be exercised.

GREEN            Volcanic activity considered to have ceased and volcano reverted to its normal
ALERT            state.

Note. – The colour code for the level of alert indicating the status of activity of the volcano and any
change from a previous status of activity should be provided to the area control center by the

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responsible vulcanological agency in the State concerned, e.g. “RED ALERT FOLLOWING
YELLOW”           OR         “GREEN          ALERT         FOLLOWING        ORANGE”. Item F – If volcanic ash cloud of Item H – Indicate air routes and
        operational significance is reported,             portions of air routes and flight levels
        indicate the horizontal extent and                affected, or expected to become
        base/top of the ash cloud using                   affected.
        latitude/longitude (in whole degrees)
        and altitudes in thousands of metres Item I – Indicate closure of airspace,
        (feet) and/or radial and distance from            air routes or portions of air routes, and
        source volcano. Information initially             availability of alternative routes.
        may be based only on special air-
        report, but subsequent information Item J – Source of information, e.g.
        may be more detailed based on advice              “special air-report” or “vulcanological
        from the responsible meteorological               agency”, etc. The source of
        watch office and/or volcanic ash                  information     should always        be
        advisory center.                                  indicated, whether an eruption has
                                                          actually occurred or ash cloud Item G – Indicate forecast direction of           reported, or not.
        movement of the ash cloud at selected
        levels based on advice from the  Item K – Include in plain language
        responsible meteorological watch                  any      operationally    significant
        office and/or volcanic ash advisory               information    additional   to    the
        center.                                           foregoing.

                                   END OF INSTRUCTIONS ON ASHTAM

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              5.8 Distribution                              The NOF center then converts the
                                                            plain language message into the
5.8.1 NOTAMs           are     originated    and            standard NOTAM Format and issues
distributed by the International NOTAM                      and distributes the NOTAM in D
Offices (NOF) located at Mumbai, Kolkata,                   Series.
Delhi and Chennai aerodromes. NOTAMs are
distributed in 5 series identified by the letters       e) Series G : contains significant
A, B, C, D and G as follows:                               aeronautical information of lasting
                                                           character affecting aircraft operations.
    a) Series A : contains information in                  This G-series is issued only by
       respect of changes/unserviceability,                International NOTAM Office, Delhi.
       etc. of aeronautical facility/procedures            G Series NOTAM are issued under the
       or hazards likely to last for more than             authority of AIS Section, AAI CHQ,
       2 hours, in respect of locations of                 RG Bhavan, New Delhi and given
       direct importance to international                  wide publicity by dissemination to all
       aircraft operations. Series A is given              the recipients of NOTAM from all the
       general international distribution.                 four NOTAM Offices of AAI.

    b) Series B : contains information in                 Note. – The NOTAM of each series are
       respect of changes/unserviceability,         allocated a serial number by the respective
       etc. of aeronautical facility/procedures     NOTAM Offices, commencing with No.0001
       or hazards likely to last more than 30       preceded by the designated letter of the series
       minutes but less than 2 hours in             A,B,C,D & G as the case may be at 0000UTC
       respect of locations of direct               on 1st January every year.
       importance to international aircraft
       operations. Series B is given limited        5.8.2 Priority – The priority accorded to a
       international distribution to adjacent       NOTAM message sent over the AFS is GG.
       FIRs/stations only.                          Under exceptional circumstances and when
                                                    justified by a requirement or special handling,
    c) Series C : contains information in           a NOTAM may be given a higher DD priority.
       respect of changes/unserviceability,
       etc. of aeronautical facility/procedures     5.8.3 The AFS shall be utilized for NOTAM
       or hazards in respect of locations used      distribution.
       by domestic flights only. Series C is
       given national distribution only.            5.8.4 A pre-determined distribution system
                                                    for NOTAM transmitted on the AFS is used
    d) Series D : contains information in           for international exchange of NOTAM.
       respect of changes/unserviceability,         Selective distribution lists are used by the four
       etc. of aeronautical facility/procedures     NOF centers as per Annexure A. Selective
       or hazards in respect of locations of        distribution lists have also been published in
       military controlled airfields utilized by    ICAO Doc 7383 – Aeronautical Information
       civil flights. For the issuance of D         Services Provided by States.
       Series NOTAM, a message in plain-
       language is sent by Air Headquarters               Note.- Top line of the table depicts
       or an IAF station to the NOF center          location of International NOTAM Office and
       concerned, with a prefix of letter “M”       the contents below each NOF, depicts the
       in the message number to intimate the        name of the countries with which the NOTAM
       changes/unserviceability,      etc.    of    exchange takes place.
       aeronautical facilities/procedures or
       hazards in respect of military airfields.

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                                              Annexure A
                               International NOTAM Offices with which
                                       NOTAMs are exchanged
CHENNAI                    KOLKATA                 MUMBAI                    NEW DELHI
Abu Dhabi                  Abu Dhabi               Abu Dhabi                 Abu Dhabi
Amman (E)                  Amsterdam (E)           Accra                     Addis Ababa
Bahrain (E)                Baghdad                 Addis Ababa               Amman
Bangkok                    Bahrain (E)             Amman                     Amsterdam (E)
Brisbane                   Bangkok                 Amsterdam                 Ankara
Brunei (E)                 Beijing (E)             Ankara                    Baghdad
Bucuresti                  Brisbane                Athinai                   Bahrain (E)
Colombo                    Brunei (E)              Baghdad                   Bangkok
Frankfurt                  Bucuresti               Bahrain                   Beijing (E)
Ho-Chi-Minh                Chennai                 Bangkok                   Beirut
Hong Kong                  Dar es Salaam (R)       Beijing                   Brisbane
Jakarta                    Dhaka                   Beirut                    Brunei
Karachi                    Frankfurt (E)           Beograd (R)               Bruxelles (R)
Kathmandu (R)              Ho-Chi-Minh             Brisbane                  Bucuresti
Kolkata                    Hong Kong               Brunei                    Cairo
Kuala Lumpur               Jakarta                 Bruxelles (R)             Chennai
Kuwait                     Kabul (R)               Bucuresti (R)             Colombo
London                     Karachi                 Budapest (R)              Damascus
Macao                      Kathmandu               Cairo                     Dar es Salaam (R)
Mahe                       Kuala Lumpur            Chennai                   Dhaka
Male                       Kuwait                  Colombo                   Frankfurt
Manila (R)                 London                  Damascus                  Ho-Chi-Minh
Mumbai                     Macao                   Dar es Sallam             Hong Kong
Muscat                     Manila                  Dhaka                     Jakarta
Nairobi                    Moskva (E)              Frankfurt                 Jeddah
New Delhi                  Mumbai                  Harare (R)                Kabul
Ottawa (E)                 Muscat                  Ho-Chi-Minh               Karachi
Sanaa(R)                   New Delhi               Hong Kong                 Kathmandu
Singapore                  Ottawa (E)              Jakarta                   Kolkata
Stockholm (E)              Praha (E)               Kabul (R)                 Kuala Lumpur
Tehran (E)                 Singapore               Karachi                   Kuwait
Tokyo (E)                  Stockholm (E)           Kathmandu                 London
Washington                 Tehran                  Kolkata                   Mahe
Wien                       Tokyo (E)               Kuala Lumpur              Mogadishu
Yangon                     Vientiane               Kuwait                    Moskva
Zurich (E)                 Warszawa (E)            London                    Mumbai
                           Washington              Lusaka (R)                Muscat
                           Yangon                  Macao                     Nairobi
                           Zurich (E)              Mahe                      Nicosia (E)
                                                   Male                      Ottawa(E)
                                                   Manila                    Plaisance (R)
                                                   Mogadishu                 Praha (E)
                                                   Moskva                    Roma (R)
                                                   Muscat                    Sanaa
                                                   Nairobi                   Singapore
                                                   New Delhi                 Stockholm (E)
                                                   Nicosia                   Tehran (E)
                                                   Ottawa (E)                Tel Aviv (E)
                                                   Plaisance                 Tokyo (E)
                                                   Praha (E)                 Warszawa
                                                   Roma Sanaa                Washington
                                                   Singapore                 Wien
                                                   Stockholm                 Yangon
                                                   Tehran                    Zurich (E)

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                                         CHAPTER 6.

                        AERONAUTICAL INFORMATION
                      REGULATION AND CONTROL (AIRAC)

         6.1 The need for control
6.1.1 Information concerning changes in               b)    The AIRAC effective date must be
facilities services or procedures in most cases             in     accordance       with      the
requires amendments to be made to airline                   predetermined internationally agreed
operations manuals or other documents                       schedule of effective dates based on
produced by various aviation agencies. The                  an interval of 28 days including 1st
organizations responsible for maintaining                   September, 2005
these publications upto date usually work to a
prearranged production programme. If AIP              c)    Information so notified must not be
supplements concerning such information                     changed further for at least another
were published haphazardly with a non-                      28 days after the indicated effective
regulated effective dates, it would be                      date, unless the circumstances
impossible to keep the manuals and other                    notified is of temporary nature and
documents upto date. Alternatively, if a                    would not persist for the full period.
schedule of predetermined dates on which
changes were to become effective were fixed       6.2.2 Essentially, implementation dates
throughout the year, it would be possible for a   other than AIRAC effective dates must not be
production programme to be based on these         used for pre-planned, operationally significant
predetermined dates.                              changes requiring cartographic work and/or
                                                  updating of navigation data bases.
          6.2 Regulated system
                                                      6.3 Information to be notified
6.2.1 Since many of the changes to                             by AIRAC
facilities, services and procedures can be
anticipated and become effective in                                  PART 1
accordance with a predetermined schedule of
effective dates, ICAO recommends use of a         6.3.1 The establishment, withdrawal of, and
regulated system (AIRAC) designed to ensure       premeditated significant changes (including
that:                                             operational trials) to:

    a)    information              concerning Limits (horizontal and vertical),
          circumstances listed in 6.3 will be     regulations and procedures applicable to:
          issued as AIP Supplements. These
          supplements must be identified by           a) flight information regions;
          the    acronym     “AIRAC”      and
          distributed at least 42 days in             b) control areas;
          advance of the effective date with
          the objective of reaching recipients        c) control zones;
          at least 28 days in advance of the
          same date.                                  d) advisory areas;

                                                      e) ATS routes;

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   f) permanent danger, prohibited and                 6.4 Schedule of AIRAC effective dates
      restricted areas (including type and
      periods of activity when known) and            6.4.1 The schedule of predetermined
      ADIZ;                                          internationally agreed AIRAC effectives dates
                                                     for the years 2005 and 2008 are as follows:
   g) permanent areas or routes or portions
      thereof where the possibility of
      interception exists.                           2005                    2006
                                                     20 January              19 January Positions, frequencies, call signs,          17 February             16 February
known irregularities and maintenance periods         17 March                16 March
of radio navigation aids and communication           14 April                13 April
facilities.                                          12 May                  11 May
                                                     09 June                 08 June Holding and approach procedures,             07 July                 06 July
arrival and departure procedures, noise              04 August               03 August
abatement procedures and any other pertinent         01 September            31 August
ATS procedures.                                      29 September            28 September
                                                     27 October              26 October Meteorological facilities (including         24 November             23 November
broadcasts) and procedures.                          22 December             21 December Runways and stopways.                        2007                    2008
                                                     18 January              17 January
                                                     15 February             14 February
                    PART 2                           15 March                13 March
                                                     12 April                10 April
                                                     10 May                  08 May
6.3.2 The establishment and withdrawal of,           07 June                 05 June
and premeditated significant changes to:             05 July                 03 July
                                                     02 August               31 July Position, height       and   lighting   of   30 August               28 August
navigational obstacles.                              27 September            25 September
                                                     25 October              23 October Taxiways and aprons.                         22 November             20 November
                                                     20 December             18 December Hours of service:            aerodromes,
facilities and services.                             Note.- AIP INDIA GEN 3.1-5 may be
                                                     consulted for AIRAC effective dates for Customs,     immigration     and   health    subsequent years.
                                                                 6.5 Significant dates Temporary danger, prohibited and
restricted areas and navigational hazards,           6.5.1 There are three significant dates
military exercises and mass movements of             associated with the AIRAC system:
                                                        a) the effective date; Temporary areas or routes or portions
thereof where the possibility of interception           b) the publication date; and

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    c) the latest date for raw material to                 6.7 Provision of information
       reach the AIS.                                          in paper copy form

6.5.2 There must be an interval of 42 days         6.7.1 In all instances information provided
between the publication/distribution date and      under the AIRAC system shall be published in
the effective date. This allows for a period of    paper copy form and shall be distributed by
upto 14 days distribution time, by the most        the AIS unit at least 42 days in advance of the
expeditious means, in order for recipients to      effective date with the objective of reaching
receive the information at least 28 days in        recipients at least 28 days in advance of the
advance of the effective date. In cases where      effective date.
major changes are planned and more advance
notice is desirable and practicable, a
distribution date of 56 days, or even longer, in           6.8 Provision of information
advance of the effective date should be used.                   in electronic form

6.5.3 When the AIS Section does not
receive any information for publication on the     6.8.1 When AAI establishes an aeronautical
next scheduled AIRAC effective date, a NIL         data base in electronic form, the following
Notification shall be originated and distributed   shall be applicable:
by NOTAM at least one cycle (28 days or
more) before the AIRAC effective date                  a) when updating its contents concerning
concerned.                                                the circumstances listed in 6.3 Part 1,
                                                          ensure that the effective dates of data
     6.6 Use of AIRAC system during                       coincide with the established AIRAC
             holiday periods                              effective dates used for the provision
                                                          of information in paper copy form.
6.6.1 In some parts of the world, the use of
an AIRAC effective date that falls within
major holiday periods, e.g. Christmas/New          6.8.2 Information provided in electronic
year, creates difficulty in processing the         form, concerning the circumstances listed in
material received because of reduced staff         6.3 Part 1, shall be distributed/made available
during these periods. In addition, the increased   by the AIS unit, so as to reach recipients at
burden on postal services during such period       least 28 days in advance of the AIRAC
frequently delays delivery of AIRAC material,      effective date.
causing considerable problems to users.

6.6.2 To improve the situation during the          6.8.3 Whenever major changes are planned
year end holiday period, it is recommended by      and where advance notice is desirable and
ICAO that the AIRAC cycle date occurring in        practicable, information provided in electronic
the 28-day period from 21 December to 17           form should be distributed/made available at
January inclusive not be used for AIRAC            least 56 days in advance of the effective date.
effective dates for the introduction of
significant operational changes.

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                                          CHAPTER 7.

                           AERONAUTICAL INFORMATION
                                CIRCULARS (AIC)

7.(i)   In India the responsibility to issue and       b) information of a purely explanatory or
disseminate      Aeronautical       Information           advisory nature liable to affect flight
Circulars (AICs) has been entrusted to                    safety;
Director General of Civil Aviation (DGCA)
under Rule 133A of the Aircraft Rules, 1937.           c) information or notification of an
This job is executed by a separate section                explanatory or advisory nature
called the Aeronautical Information Service               concerning technical, legislative or
(AIS) section under the Directorate of                    purely administrative matters.
Regulations & Information.
                                                   This shall include:
7.(ii) An Assistant Director, qualified in
CNS-ATM matters, heads this section. Any               1) forecasts of important changes in the
correspondence may be done at the following               air navigation procedures, services
address:                                                  and facilities provided;

The Director General of Civil Aviation                 2) forecasts of implementation of new
Technical Center, opposite Safdarjung Airport,            navigational systems;
Aurbindo Marg,
New Delhi – 110 014.                                   3) significant information arising from
INDIA                                                     aircraft accident/incident investigation
E-mail :                                  which has a bearing on flight safety;

              7.1 Origination                          4) information on regulations relating to
                                                          the safeguarding of international civil
7.1.1 An AIC is originated whenever it is                 aviation against acts of unlawful
necessary    to   promulgate      aeronautical            interference;
information which does not qualify:
                                                       5) advice on medical matters of special
    a) under the specifications in 4.1 for                interest to pilots;
       inclusion in an AIP; or
                                                       6) warnings to pilots concerning the
    b) under the specifications in 5.1 for the            avoidance of physical hazards;
       origination of a NOTAM.
                                                       7) effect of certain weather phenomena An AIC is originated whenever it is               on aircraft operations;
desirable to promulgate:
                                                       8) information on new hazards affecting
    a) a long-term forecast of any major                  aircraft handling techniques;
       change in legislation, regulations,
       procedures or facilities;                       9) regulations relating to the carriage of
                                                          restricted articles by air;

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    10) reference to the requirements of, and    winter conditions – and shall contain
        publication of changes in, national      information such as that listed below:
                                                     a)     a list of aerodromes/heliports where
    11) aircrew licensing arrangements;                     snow clearance is expected to be
                                                            performed during the coming winter:

    12) training of aviation personnel;                   *1) in accordance with the runway and
                                                              taxiway systems; or
    13) application of, or exemption from,
        requirements in national legislation;
                                                          *2) planned snow clearing, deviating
    14) advice on the use and maintenance of                  from the runway system (length,
        specific types of equipment;                          width and number of runways,
                                                              affected taxiways and aprons or
    15) actual or planned availability of new                 portions thereof);
        or revised editions of aeronautical
        charts;                                      *b) information concerning any center
                                                         designated to coordinate information
    16) carriage of radio equipment;                     on the current state of progress of
                                                         clearance and on the current state of
    17) explanatory information relating to              runways, taxiways and aprons;
        noise abatement;
                                                     c) a division of the aerodromes/heliports
    18) selected airworthiness directives;              into SNOWTAM distribution lists in
                                                        order to avoid excessive NOTAM
    19) changes in NOTAM series or                      distribution;
        distribution, new editions of AIP or
        major changes in their contents,             *d) an indication, as necessary, or minor
        coverage or format;                              changes to the standing snow plan;

    20) advance information on the snow plan         *e) a descriptive list of clearance
        (see;                                   equipment;

    21) other information of a similar nature.      *f) a listing of what will be considered as
                                                        the minimum critical snow bank to be
    Note.- The publication of an AIC does not           reported at each aerodrome/heliport at
remove the obligations set forth in Chapters            which reporting will commence.
4 and 5.                                            _________
                                                    * This information, or any part of it, may At present, India being tropical              be included in the AIP, if so desired.
climate State, there has no circumstance/
requirement and, therefore, there is no snow                 7.2 General specifications
plan for the published aerodromes. However,
provision is being kept to meet future
requirement. The snow plan published under       7.2.1 AIC are issued in printed form, and in
AD 1.2.2 of the AIP shall be supplemented by     addition are also placed on the DGCA website
seasonal information, to be issued well in       http:/
advance of the beginning of each winter – not
less than one month before the normal onset of   Note.- Both text and diagrams are included.

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__________________________________________________________________________________________ The selected AIC           are    given        in force are sufficient to make identification in
international distribution.                            this form necessary.
                                                                Note.- Guidance on colour coding of Each AIC is allocated a serial number          AIC by subject can be seen in the Aeronautical
which is consecutive and based on the                  Information Services Manual (Doc 8126).
calendar year.
                                                       7.2.2 A checklist of AIC currently in force When AIC are distributed in more               is issued in the beginning of every year as
than one series, each series shall be separately       Sr.No. 01/(year), with distribution as for the
identified by a letter.                                AIC. Annex 15 has provisions for                    7.2.3 Given below is a list of some
differentiation and identification of AIC topics       significant AICs that will give a fairly good
according to subjects using colour coding              idea about subjects covered and the kind of
should be practiced where the numbers of AIC           information contained in an AIC:

         (a)         AIC 09/1985            Carriage of animals/ birds by air.
         (b)         AIC 05/1989            Grant of NOC for construction of buildings etc.
         (c)         AIC 11/1990            Minimum Cockpit Crew.
         (d)         AIC 13/1991            Conversion of foreign licences to corresponding Indian
         (e)         AIC 22/1992            Guidelines for issue of Aerodrome Licence.
         (f)         AIC 28/1992            Flight Duty Time and Flight Time Limitation.
         (g)         AIC 03/1997            Entry into the cockpit and occupancy of the jump seat in
                                            aircraft registered in India.
         (h)         AIC 03/2000            Requirements for issuance of an Operating Authorisation
                                            to a foreign carrier.
         (i)         AIC 07/2004            Permission of photography inside an aircraft in flight.
         (j)         AIC 09/2005            Guidelines for foreign equity participation in domestic Air
                                            Transport Sector.

                                                                      7.3 Distribution

                                                       AIC selected for international distribution are
                                                       given the same distribution as that for the AIP.

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                                          CHAPTER 8.

                            PRE-FLIGHT AND POST-FLIGHT

          8.1 Pre-flight information                   f)   presence of other temporary hazards;

8.1.1 At any aerodrome normally used for               g) presence of birds constituting a
international air operations, aeronautical                potential hazard to aircraft operations;
information essential for the safety, regularity
and efficiency of air navigation and relative to       h) failure or irregular operation of part or
the route stages originating at the aerodrome             all of the aerodrome lighting system
shall be made available to flight operations              including       approach,     threshold,
personnel, including flight crews and services            runway, taxiway, obstruction and
responsible for pre-flight information.                   manoeuvring area unserviceability
                                                          lights and aerodrome power supply;
8.1.2 Aeronautical information provided for
pre-flight planning purposes at the aerodromes         i)   failure, irregular operation and
referred to in 8.1.1 shall include relevant:                changes in the operational status of
                                                            ILS (including markers), MLS, basic
    a)   elements     of    the     Integrated              GNSS, SBAS, GBAS, SRE, PAR,
         Aeronautical Information Package;                  DME, SSR, VOR, NDB, VHF
                                                            aeromobile channels, RVR observing
    b)   maps and charts.                                   system, and secondary power supply;
                                                            and Additional      current    information
relating to the aerodrome of departure shall be        j)   presence      and      operation   of
provided concerning the following:                          humanitarian relief missions, such as
                                                            those undertaken under the auspices
    a)   construction or maintenance work on                of the United Nations, together with
         or immediately adjacent to the                     any associated procedures and/or
         manoeuvring area;                                  limitations applied thereof.

    b) rough portions of any part of the           8.1.3 A recapitulation of current NOTAM
       manoeuvring area, whether marked or         and other information of urgent character shall
       not, e.g. broken parts of the surface of    be made available to flight crews in the form
       runways and taxiways;                       of plain-language pre-flight information
                                                   bulletins (PIB). AIP India GEN 3.1-3 to 3.1-6
    c)   presence and depth of snow, ice or        contains provisions on PIB and ASBS.
         water on runways and taxiways,
         including their effect on surface                      8.2 Bulletin format
                                                   8.2.1 The pre-flight information bulletin
    d) snow drifted or piled on or adjacent to     must include the following characteristics:
       runways or taxiways;
                                                       a)   NOTAM                text          in
    e)   parked aircraft or other objects on or             significations/uniform    abbreviated
         immediately adjacent to taxiways;                  phraseology assigned to the ICAO
                                                            NOTAM Code complemented by

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         ICAO abbreviations, indicators,            concerned, to aeronautical information/data
         identifiers, designators, call sings,      and meteorological information, AAI shall
         frequencies, figures and plain-            remain responsible for the quality and
         language. Since NOTAM are the              timeliness of the aeronautical information/data
         principal source of information            provided by means of such a system.
         which form the contents of the PIB.
                                                    8.3.4 The IMD remains responsible for the
    b)   NOTAM number.                              quality of the meteorological information
                                                    provided by means of such system in
8.2.2 Bulletins must be prepared in the             accordance with 9.5.1 of Annex 3.
following sequence:
                                                    8.3.5 Automated pre-flight information
    a)   a heading (identity of origination,        systems for the supply of aeronautical
         area covered and for whom prepared);       information/data for self-briefing, flight
                                                    planning and flight information service should:
    b)   en-route information;
                                                        a) provide for continuous and timely
    c)   aerodrome information;                            updating of the system database and
                                                           monitoring of the validity and quality
    d)   navigation warnings.                              of the aeronautical information stored;

         8.3 Automated aeronautical                     b) permit access to the system by
             information systems                           operations personnel including flight
                                                           crew members, aeronautical personnel
8.3.1 When           automated         pre-flight          concerned and other aeronautical users
information systems are used to make                       through suitable telecommunications
aeronautical information/data available to                 means;
operations personnel, including flight crew
members for self-briefing, flight planning and          c) ensure provision, in paper copy form,
flight information service purposes, the                   of the aeronautical information/data
information/data made available shall comply               accessed, as required;
with the provision of 8.1.2 and 8.1.3.
                                                        d) use     access    and      interrogation
8.3.2 Automated pre-flight information                     procedures based on abbreviated plain
systems providing a harmonized, common                     language      and    ICAO       location
point of access by operations personnel,                   indicators, as appropriate, or based on
including flight crew members and other                    a menu-driven user interface or other
aeronautical    personnel    concerned,   to               appropriate mechanism as agreed
aeronautical information in accordance with                between AAI and operator concerned;
8.2.1 and meteorological information in                    and
accordance with 9.5.1 of Annex 3 –
Metrological Service for International Air              e) provide for rapid response to a user
Navigation, should be established between                  request for information.
AAI      and     the   India    Metrological
Department(IMD)                                              8.4 Post-flight information

8.3.3 Where        automated       pre-flight              Purpose of post-flight information
information systems are used to provide the
harmonized, common point of access by               8.4.1 The purpose of post-flight information
operations personnel, including flight crew         is   to    ensure       that    malfunctioning/
members and other aeronautical personnel            unserviceability of visual or non-visual aids or

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any other facility essential to the safety of       8.4.3      It is possible, in some cases that a
flight operations observed by the Pilot during      Pilot may wish to confirm his observations in
the flight are reported without delay to the        writing. The Pilot may be informed to send his
authorities responsible for those facilities.       report to the ARO for further required action.
Similarly, presence of birds on or around the       The report must subsequently be made
airport constituting a potential hazards to         available to AIS for such distribution as
aircraft operations, observed by a Pilot during     necessary.
the flight should be reported without delay.
This is to ensure that this information is made
available for distribution as the circumstances

         Collection and distribution of
            post-flight information

8.4.2 In most cases malfunctioning/
unserviceability of facilities or the presence of
birds is reported by the Pilot on the ATC
frequency on which he is in contact. ATS unit
concerned, then must pass this information to
the WSO/senior most Officer (in the shift) and
to the AIS unit for further dissemination.
WSO/ senior most Officer in the shift shall in
turn pass-on the information to the
department/unit responsible for the facility or
the services and also make log entry.

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                                        CHAPTER 9.


9.1    All AAI International NOTAM
Offices are connected to the Aeronautical
Fixed Service (AFS).

9.1.1 The connection shall provide for
printed communications.

9.2     Each International NOTAM Office
has been connected, through the AFS, to the

   a)    area      control      centers/flight
         information centers;

   b)    aerodromes where either an AIS unit
         has been established or another ATS
         unit has been designated to provide
         AIS service.

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                                         CHAPTER 10.

                               ELECTRONIC TERRAIN AND
                                   OBSTACLE DATA

                10.1 Function

Sets of electronic terrain and obstacle data       10.2 Coverage and terrain and obstacle data
used in combination with aeronautical data, as              numerical requirements
appropriate, shall satisfy user requirements
necessary to support the following air             10.2.1 To satisfy requirements necessary to
navigation applications:                           accommodate air navigation systems or
                                                   functions specified in 10.1, sets of electronic
   a)   ground proximity warning system            terrain and obstacle data shall be collected and
        with    forward   looking terrain          recorded in databases in accordance with the
        avoidance function and minimum             following coverage areas:
        safe altitude warning (MSAW)
        system;                                      -     Area 1 : entire territory of a State;

   b)   determination     of     contingency         -     Area 2 : terminal control area;
        procedures for use in the event of an
        emergency during a missed approach           -     Area 3 : aerodrome/heliport area; and
        or take-off;
                                                     -     Area 4 : Category II or III operations
   c)   aircraft operating limitations analysis;           area.

   d)   instrument       procedure      design        Note.- See Appendix B for graphical
        (including circling procedure);            illustrations of the defined coverage areas.

   e)   determination of en-route “drift-          10.2.2 Area 1 shall cover the entire territory
        down” procedure and en-route               of a State, including aerodromes, Area 2 shall
        emergency landing location;                be the terminal control area as published in a
                                                   State’s aeronautical information publication
   f)   advanced surface movement guidance         (AIP) or limited to a 45-km radius from the
        and control system (A-SMGCS);              aerodrome reference point (whichever is
                                                   smaller). At IFR aerodromes where a terminal
   g)   aeronautical chart production and on-      control area has not been established, Area 2
        board databases;                           shall be the area within a 45-km radius of the
                                                   aerodrome reference point.
   h)   flight simulator;
                                                   10.2.3 At IFR aerodromes, Area 3 shall cover
   i)   synthetic vision; and                      the area that extends from the edge(s) of the
                                                   runway(s) to 90 m from the runway center
   j)   aerodrome obstacle restriction and         line(s) and for all other parts of aerodrome
        removal.                                   movement area(s), 50 m from the edge(s) of
                                                   the defined area(s).

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10.2.4 Area 4 shall be restricted to those         maintain a constant        linear    density     of
runways where precision approach Category II       measurement points.
or III operations have been established and
where detailed terrain information is required     10.3.2 Sets of electronic terrain data shall
by operators to enable them to assess, by use      include spatial (position and elevation),
of radio altimeters, the effect of terrain on      thematic and temporal aspects for the surface
decision height determination. The width of        of the Earth containing naturally occurring
the area shall be 60 m on either side of the       features such as mountains, hills, ridges,
extended runway center line while the length       valleys, bodies of water, permanent ice and
shall be 900 m from the runway threshold           snow, and excluding obstacles. In practical
measured along the extended runway center          terms, depending on the acquisition method
line.                                              used, this shall represent the continuous
                                                   surface that exists at the bare Earth, the top of
10.2.5 According to the air navigation             the canopy or something in-between, also
applications listed in 10.1 and areas of           known as “first reflective surface”.
coverage, sets of electronic terrain data shall
satisfy the numerical requirements specified in    10.3.3 Terrain data shall be collected
Appendix B, Table B-1 while obstacle data          according to the areas specified in 10.2, terrain
shall satisfy the numerical requirements           data collection surfaces and criteria specified
specified in Appendix B, Table B-2.                in Appendix B, Figure B-1, and in accordance
                                                   with the terrain data numerical requirements
  Note 1.- Numerical terrain and obstacle          provided in Table B-1 of Appendix B. In
data requirements for Area 2 provided in           terrain databases, only one feature type, i.e.
Appendix B, Table B-1 and Table B-2,               terrain, shall be recorded. Feature attributes
respectively, are defined on the basis of the      describing terrain shall be those listed in
most stringent application requirement             Appendix B, Table B-3. The terrain feature
(application listed under 10.1 b).                 attributes listed in Table B-3 represent the
                                                   minimum set of terrain attributes, and those
   Note 2.- It is recognized that some             annotated as mandatory shall be recorded in
applications listed in 10.1 could be adequately    the terrain database.
accommodated with terrain and obstacle data
sets that are of lower requirements than those           10.4 Obstacle database – content
specified in Appendix B, Table B-1 and Table                      and structure
B-2, respectively. Consequently, careful
evaluation of available data sets by data users    10.4.1 One obstacle database shall contain a
is necessary in order to determine if the          digital set of obstacle data and shall include
products are fit for their intended use.           those features having vertical significance in
                                                   relation to adjacent and surrounding features
      10.3 Terrain database – content              that are considered hazardous to air
              and structure                        navigation. Obstacle data shall comprise that
                                                   digital representation of the vertical and
10.3.1 A terrain database shall contain digital    horizontal extent of man-made objects.
sets of data representing terrain surface in the   Obstacles shall not be included in terrain
form of continuous elevation values at all         databases. Obstacle data elements are features
intersections (points) of a defined grid,          that shall be represented in the database by
referenced to common datum. A terrain grid         points, lines or polygons.
shall be angular or linear and shall be of
regular or irregular shape.                        10.4.2 Obstacles, which in accordance with
                                                   the definition, can be fixed (permanent or
   Note.- In regions of higher latitudes,          temporary) or mobile shall be identified within
latitude grid spacing may be adjusted to           the areas defined in 10.2, on the basis of the

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obstacle data collection surfaces and criteria     10.5.4 The overview of terrain data product
specified in Appendix B, Figure B-2, and           specification or obstacle data specification
collected in accordance with obstacle data         shall provide an informal description of the
numerical requirements provided in Table B-2       product and shall contain general information
of Appendix B. In an obstacle database, all        about the data product. Specification of terrain
defined obstacle feature types shall be            data may not be homogenous across the whole
recorded and each of them shall be described       data product but may vary for different parts
according to the list of mandatory attributes      of the data sets. For each such subset of data, a
provided in Table B-4 of Appendix B.               specification scope shall be identified.
                                                   Identification information concerning both
  Note.- Specific attributes associated with       terrain and obstacle data products shall include
mobile (feature operations) and temporary          the title of the product; a brief narrative
types of obstacles are annotated in Appendix       summary of the content, purpose, and spatial
B, Table B-4, as optional attributes. If these     resolution if appropriate (a general statement
types of obstacles are to be recorded in           about the density of spatial data); the
database, appropriate attributes describing        geographic area covered by the data product;
such obstacles are also required.                  and supplemental information.

       10.5 Terrain and obstacle data              10.5.5 Content information of feature-based
           product specifications                  terrain data sets or of feature-based obstacle
                                                   data sets shall each be described in terms of an
10.5.1 To allow and support the interchange        application schema and a feature catalogue.
and use of sets of electronic terrain and          Application schema shall provide a formal
obstacle data among different data providers       description of the data structure and content of
and data users, the ISO 19100 series of            data sets while the feature catalogue shall
standards for geographic information shall be      provide the semantics of all feature types
used as a general data modeling framework.         together with their attributes and attribute
                                                   value domains, association types between
10.5.2 A comprehensive statement of                feature types and feature operations,
available electronic terrain and obstacle data     inheritance relations and constraints. Coverage
sets shall be provided in the form of terrain      is considered a subtype of a feature and can be
data product specifications as well as obstacle    derived from a collection of features that have
data product specifications on which basis air     common attributes. Both terrain and obstacle
navigation users will be able to evaluate the      data product specifications shall identify
products and determine whether they fulfill the    clearly the coverage and/or imagery they
requirements for their intended use                include and shall provide a narrative
(application).                                     description of each of them.

  Note.- ISO Standard 19131 specifies the             Note 1. – ISO Standard 19109 contains
requirements and outline of data product           rules for application schema while ISO
specifications for geographic information.         Standard 19110 describes feature cataloguing
                                                   methodology for geographic information.
10.5.3 Each terrain data product specification
shall include an overview, a specification           Note 2. – ISO Standard 19123 contains
scope, data product identification, data content   schema for coverage geometry and functions.
and structure, reference system, data quality,
data capture, data maintenance, data portrayal,    10.5.6 Both           terrain    data    product
data product delivery, additional information,     specifications     and obstacle data product
and metadata.                                      specifications    shall include information that
                                                   identifies that    reference system used in the
                                                   data product.     This shall include the spatial

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reference system and temporal reference             10.5.9 The core terrain and obstacle metadata
system. Additionally, both data product             elements shall be included in the data product
specifications shall identify the data quality      specifications. Any additional metadata items
requirements for each data product. This shall      required to be supplied shall be stated in each
include     a    statement    on     acceptable     product specification together with the format
conformance quality levels and corresponding        and encoding of the metadata.
data quality measures. This statement shall
cover all the data quality elements and data          Note.- ISO Standard 19115 specifies
quality sub-elements, even if only to state that    requirements for geographic information
a specific data quality element or sub-element      metadata.
is not applicable.
                                                                   10.6 Availability
   Note.- ISO Standard 19113 contains quality
principles for geographic information while         10.6.1 States shall ensure that electronic
ISO Standard 19114 covers quality evaluation        terrain and obstacle data related to their entire
procedures.                                         territory are made available in the manner
                                                    specified in 10.2, 10.3 and 10.4 for use by
10.5.7 Terrain data product specifications          international civil aviation.
shall include a data capture statement which
shall be a general description of the sources shall ensure that as of 20
and of processes applied for the capture of         November 2008, electronic terrain and
terrain data. The principles and criteria applied   obstacle data are made available in accordance
in the maintenance of terrain data sets and         with Area 1 specifications and terrain data in
obstacle data sets shall also be provided with      accordance with Area 4 specifications.
the data specifications, including the
frequency with which data products are     States shall ensure that as of 18
updated. Of particular importance shall be the      November 2010 electronic terrain and
maintenance information of obstacle data sets       obstacle data are made available in accordance
and an indication of the principles, methods        with Area 2 and Area 3 specifications.
and criteria applied for obstacle data
maintenance.                               Recommendation. – States should
                                                    ensue that electronic terrain and obstacle data
10.5.8 Terrain data product specifications          are made available in accordance with Area 1,
shall contain information on how data held          Area 2 and Area 3 specifications and terrain
with data sets is presented, i.e. as a graphic      data in accordance with Area 4 specifications.
output, as a plot or as an image. The product
specifications for both terrain and obstacles       10.6.2 Recommendations. – At those
shall also contain data product delivery            aerodromes      located      near    territorial
information which shall include delivery            boundaries, arrangements should be made
formats and delivery medium information.            among States concerned to share terrain and
                                                    obstacle data for the entire Area 2.
   Note.- ISO Standard 19117 contains a
definition of the schema describing the
portrayal of geographic information including
the methodology for describing symbols and
mapping of the schema to an application

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                                               (see Chapter 10)

                 Figure B-1. Terrain data collection surfaces — Area 1 and Area 2

1.Within the area covered by a 10-km radius from the ARP, terrain data shall be collected and
  recorded in accordance with the Area 2 numerical requirements.

2. In the area between 10 km and the TMA boundary or 45-km radius (whichever is smaller), data on
  terrain that penetrates the horizontal plane 120 m above the lowest runway elevation shall be
  collected and recorded in accordance with the Area 2 numerical requirements.

3. In the area between 10 km and the TMA boundary or 45-km radius (whichever is smaller), data on
  terrain that does not penetrate the horizontal plane 120 m above the lowest runway elevation shall
  be collected and recorded in accordance with the Area 1 numerical requirements.

4. In those portions of Area 2 where flight operations are prohibited due to very high terrain or other
  local restrictions and/or regulations, terrain data shall only be collected and recorded in accordance
  with the Area 1 numerical requirements.

Note.— Terrain data numerical requirements for Areas 1 and 2 are specified in table B-1

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                                                                                           Appendix B

                 Fig B-2 Obstacle Data Collection Surfaces- Area 1 & Area 2

1. Obstacle data shall be collected and recorded in accordance with the Area 2 numerical requirements
  specified in Table B-2:

a) any obstacle that penetrates the conical surface whose origin is at the edges of the 180-m wide
  rectangular area and at the nearest runway elevation measured along the runway centre line,
  extending at 1.2 per cent slope until it reaches 120 m above the lowest runway elevation of all
  operational runways at the aerodrome (1.2 per cent slope reaches 120 m at 10 km); in the remainder
  of Area 2 (between 10 km and the TMA boundary or 45-km radius, whichever is smaller), the
  horizontal surface 120 m above the lowest runway elevation; and

b) in those portions of Area 2 where flight operations are prohibited due to very high terrain or other
  local restrictions and/or regulations, obstacle data shall be collected and recorded in accordance
  with the Area 1 requirements.

2. Data on every obstacle within Area 1 whose height above the ground is 100 m or higher shall be
  collected and recorded in the database in accordance with the Area 1 numerical requirements
  specified in Table B-2.

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                                                                                          Appendix B

                 Fig B-3 Terrain and obstacle data collection surface – Area 3

1. Data on terrain and obstacles that extend more than a half-metre (0.5 m) above the horizontal plane
  passing through the nearest point on the aerodrome/heliport movement area shall be collected and

2.Terrain and obstacle data in Area 3 shall be collected and recorded in accordance with numerical
  requirements specified in Table B-1 and Table B-2, respectively.

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                                                                                         Appendix B

                         Fig. B-4 Terrain Data Collection Surface – Area 4

Only terrain data shall be collected and recorded in Area 4 in accordance with the numerical
requirements specified in Table B-1.

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                          Table B-1. Terrain data numerical requirements

                               Area 1                 Area 2                     Area 3                Area 4

Post spacing             3 arc seconds               1 arc second             0.6 arc second     0.3 arc seconds
                         (approx. 90 m)             (approx. 30 m)            (approx. 20 m)     (approx. 9 m)

Vertical accuracy                30 m                   3m                         0.5 m                 1m

Vertical resolution              1m                    0.1 m                       0.01 m               0.1 m

Horizontal accuracy              50 m                   5m                         0.5 m                2.5 m

Confidence level (1σ)            90%                    90%                          90%                   90%

Data classification            routine                essential                  essential             essential
Integrity level                1 x 10-3               1 x 10-5                   1 x 10-5              1 x 10-5

Maintenance period             as required           as required               as required           as required

                         Table B-2. Obstacle data numerical requirements

                                        Area 1                       Area 2                    Area 3

Vertical accuracy                     30 m                           3m                        0.5 m

Vertical resolution                     1m                           0.1 m                     0.01 m

Horizontal accuracy                   50 m                           5m                        0.5 m

Confidence level (1σ)                 90%                            90%                       90%

Data classification                    routine                       essential                 essential
Integrity level                       1 x 10-3                       1 x 10-5                  1 x 10-5

Maintenance period                    as required                    as required               as required

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                                       Table B-3. Terrain attributes

                               Terrain attribute              Mandatory/Optional

                        Area of Coverage                          Mandatory

                        Data Originator Identifier                Mandatory

                        Acquisition method                        Mandatory

                        Post spacing                              Mandatory

                        Horizontal reference system               Mandatory

                        Horizontal resolution                     Mandatory

                        Horizontal accuracy                       Mandatory

                        Horizontal confidence level               Mandatory

                        Horizontal position                       Mandatory

                        Elevation                                 Mandatory

                        Elevation reference                       Mandatory

                        Vertical reference system                 Mandatory

                        Vertical resolution                       Mandatory

                        Vertical accuracy                         Mandatory

                        Vertical confidence level                 Mandatory

                        Surface type                              Mandatory

                        Recorded surface                          Mandatory

                        Penetration level                         Optional

                        Known variations                          Optional

                        Integrity                                 Mandatory

                        Date and time stamp                       Mandatory

                        Unit of measurement used                  Mandatory

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                                       Table B-4. Obstacle attributes

                               Obstacle attribute              Mandatory/Optional

                        Area of Coverage                           Mandatory

                        Data Originator Identifier                 Mandatory

                        Obstacle identifier                        Mandatory

                        Horizontal accuracy                        Mandatory

                        Horizontal confidence level                Mandatory

                        Horizontal position                        Mandatory

                        Horizontal resolution                      Mandatory

                        Horizontal extent                          Mandatory

                        Horizontal reference system                Mandatory

                        Elevation                                  Mandatory

                        Vertical accuracy                          Mandatory

                        Vertical confidence level                  Mandatory

                        Elevation reference                        Mandatory

                        Vertical resolution                        Mandatory

                        Vertical reference system                  Mandatory

                        Obstacle type                              Mandatory

                        Geometry type                              Mandatory

                        Integrity                                  Mandatory

                        Date and time stamp                        Mandatory

                        Unit of measurement used                   Mandatory

                        Operations                                 Optional

                        Effectivity                                Optional

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