RNAV_ RNP _amp; RNP RNAV by ewghwehws

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									                                                  FAA
Required Navigation Performance
(RNP), Area Navigation (RNAV)
Implementation
                   Mr. Hooper Harris
                 FAA/JAA Annual Meeting
                            Phoenix, AZ
                        June 3 - 7, 2002

               19th Annual FAA/JAA International Conference
Overview                                                  FAA

• Definitions and Advantages
    – RNAV, RNP, and RNP RNAV
•   Differentiation
•   Benefits
•   Implementation - mitigating risk
•   Conclusion


                       19th Annual FAA/JAA International Conference
RNAV
                                                         FAA

• RNAV is a method of navigation that
  permits aircraft operation on any
  desired flight path: e.g., “user preferred
  routes.”
• The application of RNAV techniques
  has been shown to provide a number of
  advantages over conventional (source-
  referenced) forms of navigation.

                      19th Annual FAA/JAA International Conference
RNAV Advantages                                                    FAA
1. User preferred routes – tracks that consider pressure
  altitude and wind and are not associated with or
  constrained by an underlying navigation aid.
2. Establishment of:
  a. more direct routes, resulting in shorter flight distances;
  b. dual or parallel routes to accommodate a greater flow
  of en route traffic;
  c. bypass routes for aircraft over flying high-density
  terminal areas;
  d. alternatives or contingency routes, either planned or
  unplanned (e.g., severe weather avoidance); and
  e. the best locations for holding patterns.

                                19th Annual FAA/JAA International Conference
RNP & Advantages                                           FAA
• A statement of the navigation performance
  accuracy necessary for operation within a
  defined airspace.
• The term RNP is also applied as a descriptor
  for airspace, routes, and procedures. The
  descriptor is flexible and can apply to a
  unique approach procedure or to a large
  region of airspace. RNP applies to navigation
  performance accuracy within an airspace,
  and therefore includes the capability of both
  the available infrastructure (navigation aids)
  and the aircraft.
                        19th Annual FAA/JAA International Conference
RNP RNAV - Per ICAO Doc 9613
                                                                  FAA
• RTCA DO-236/EUROCAE ED-75.
    – Merges the accuracy standard in the ICAO Manual, with the
      containment requirements and area navigation functional
      and performance standards.
    – The containment region quantifies the navigation
      performance where the probability of an un-annunciated
      deviation greater than 2 x RNP is less than 1 x 10-5.
    – The containment region (defined as 2 times the RNP) could
      help with safety assessments for separation and obstacle
      clearance.
• RNP RNAV will support the development of new
  obstacle clearance or aircraft-to-aircraft separation.
• RNP RNAV will enable reliable, predictable and
  repeatable ground tracks through standardized
  avionics functions.        19th Annual FAA/JAA International Conference
Differentiation
                                                             FAA
                                       RTCA/EUROCAE
                                         RNP RNAV
                        2xRNP
                                     Containment
     ICAO RNP                        Zone
                        1xRNP

         95% Accuracy                                    95%
                                                       Accuracy

                                                         95%
         95% Accuracy
                                                       Accuracy
                        1xRNP
                                     Containment
                                        Zone
                        2xRNP

                          19th Annual FAA/JAA International Conference
Transition Strategy                                        FAA
• In the short term, emphasis should be on RNAV
  implementation using all available means
  (GNSS, ground-based, and self-contained
  navaids).
• The mid term should focus on the transition to
  RNP RNAV based on GNSS.
• RNP RNAV is based on the following systems,
  where these systems meet navigation
  requirements:
  – GNSS
  – GNSS/INS
  – DME/DME/INS
                        19th Annual FAA/JAA International Conference
Industry Requirements                                      FAA




                        19th Annual FAA/JAA International Conference
Operational Approvals                                      FAA




                        19th Annual FAA/JAA International Conference
Public vs. Specials                                      FAA
Public Use               Specials
 - RNP 10, 5,             - RNP < 0.3
   2, 1, 0.3              - Alaska Airlines
 - RNAV IAPs              - Certification &
                          Aircrew Training
 - DPs and STARs
                          - Equipment
                          Requirements
                          - RTCA SC-181
                         WG13 to address RNP
                         <0.3
                      19th Annual FAA/JAA International Conference
Cooperative Goal                                            FAA
        • Middle Ground is Similar to ILS Cat II/III
          Approvals
           – public use - however
           – special aircrew training/equipment
             required
        • Build upon today’s RNP Values
           – Implement RNP <0.3 where beneficial
           – Working to identify priority airports
        • Future: RNAV Approach with vertical
          guidance can achieve precision like
          functionality
                         19th Annual FAA/JAA International Conference
Key Issues for Implementation                            FAA

• Standardization of publication/charting.
• Means of notifying users of the available
  navigation infrastructure.
• Means of managing changes in the
  navigation infrastructure.
• DME issues.


                      19th Annual FAA/JAA International Conference
Key Issues (continued)                                      FAA
• Means of providing operational status
  information to ATC.
• Accommodation of previously approved
  RNAV systems (e.g., RNAV FMS).
• Relationship between RNP level and
  obstacle clearance.
• Relationship between RNP level and
  airspace.
• Navigation Data Issues.
                         19th Annual FAA/JAA International Conference
Conclusion                                                  FAA
• RNP RNAV can satisfy the navigation element
  of the CNS/ATM equation.
• Predictable and repeatable flight paths allow
  navigation to contribute to meeting the long
  term concept of “Free Flight” and in shaping
  air navigation as an integral part of the Global
  CNS/ATM Plan.



                         19th Annual FAA/JAA International Conference

								
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