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					       Rules for Classification and Construction
III    Naval Ship Technology
1      Surface Ships




2      Propulsion Plants




Edition 2004
                     The following Rules come into force on February 1st, 2004.



                               Germanischer Lloyd Aktiengesellschaft

                                             Head Office
                               Vorsetzen 35, 20459 Hamburg, Germany
                                       Phone: +49 40 36149-0
                                       Fax: +49 40 36149-200
                                      headoffice@gl-group.com

                                          www.gl-group.com

           "General Terms and Conditions" of the respective latest edition will be applicable
(see Rules for Classification and Construction, I - Ship Technology, Part 0 - Classification and Surveys).

         Reproduction by printing or photostatic means is only permissible with the consent of
                                Germanischer Lloyd Aktiengesellschaft.

                    Published by: Germanischer Lloyd Aktiengesellschaft, Hamburg
                            Printed by: Gebrüder Braasch GmbH, Hamburg
III - Part 1                                                          Table of Contents                                                                    Chapter 2
GL 2004                                                                                                                                                      Page 3



                                                                      Table of Contents



Section 1             General Rules and Instructions

   A.          General ........................................................................................................................................   1- 1
   B.          Definitions ..................................................................................................................................     1- 2
   C.          Documents for Approval .............................................................................................................               1- 3
   D.          Ambient Conditions ....................................................................................................................            1- 4
   E.          Materials .....................................................................................................................................    1- 10
   F.          Fuels and Consumables for Operation ........................................................................................                       1- 11
   G.          Safety Equipment and Protective Measures ................................................................................                          1- 11
   H.          Survivability ................................................................................................................................     1- 12



Section 2              Design and Construction of the Machinery Installation

   A.          General ........................................................................................................................................   2- 1
   B.          Dimensions of Components ........................................................................................................                  2- 1
   C.          Availability of Machinery ...........................................................................................................              2- 2
   D.          Control and Regulating ...............................................................................................................             2- 2
   E.          Propulsion Plant ..........................................................................................................................        2- 3
   F.          Turning Appliances .....................................................................................................................           2- 5
   G.          Operating and Maintenance Instructions .....................................................................................                       2- 5
   H.          Markings, Identification ..............................................................................................................            2- 5
   I.          Engine Room Equipment ............................................................................................................                 2- 5
   J.          Communication and Signalling Equipment .................................................................................                           2- 6
   K.          Redundant Systems .....................................................................................................................            2- 7



Section 3              Internal Combustion Engines

   A.          General ........................................................................................................................................   3- 1
   B.          Documents for Approval .............................................................................................................               3- 2
   C.          Crankshaft Design .......................................................................................................................          3- 4
   D.          Materials .....................................................................................................................................    3- 4
   E.          Tests and Trials ...........................................................................................................................       3- 8
   F.          Safety Devices ............................................................................................................................        3- 13
   G.          Auxiliary Systems .......................................................................................................................          3- 16
   H.          Control Equipment ......................................................................................................................           3- 18
   I.          Alarms .........................................................................................................................................   3- 19
   J.          Engine Alignment/Seating ..........................................................................................................                3- 19
Chapter 2                                                           Table of Contents                                                                    III - Part 1
Page 4                                                                                                                                                     GL 2004



Section 4           Thermal Turbomachinery
   A.       General ........................................................................................................................................     4- 1
   B.       Materials .....................................................................................................................................      4- 1
   C.       Design and Construction Principles ............................................................................................                      4- 2
   D.       Emergency Operation .................................................................................................................                4- 4
   E.       Control and Safety Equipment ....................................................................................................                    4- 4
   F.       Monitoring Equipment ................................................................................................................                4- 5
   G.       Maintenance ................................................................................................................................         4- 6
   H.       Tests ............................................................................................................................................   4- 6
   I.       Trials ...........................................................................................................................................   4- 6


Section 5           Main Shafting
   A.       General ........................................................................................................................................     5- 1
   B.       Materials .....................................................................................................................................      5- 1
   C.       Shaft Dimensions ........................................................................................................................            5- 1
   D.       Design .........................................................................................................................................     5- 3
   E.       Pressure Tests .............................................................................................................................         5- 7
   F.       Special Requirements for Fibre Laminate Shafts ........................................................................                              5- 7


Section 6           Gears, Couplings
   A.       General ........................................................................................................................................     6- 1
   B.       Materials .....................................................................................................................................      6- 1
   C.       Calculation of the Load-Bearing Capacity of Gear Theeth .........................................................                                    6- 1
   D.       Gear Shafts ..................................................................................................................................       6- 6
   E.       Equipment ...................................................................................................................................        6- 7
   F.       Balancing and Testing ................................................................................................................               6- 7
   G.       Design and Construction of Couplings .......................................................................................                         6- 8


Section 7           Propeller
   A.       General ........................................................................................................................................     7- 1
   B.       Materials .....................................................................................................................................      7- 1
   C.       Design and Dimensioning of Propellers ......................................................................................                         7- 2
   D.       Propeller Mounting .....................................................................................................................             7- 6
   E.       Controllable Pitch Propellers ......................................................................................................                 7- 7
   F.       Balancing and Testing ................................................................................................................               7- 8
   G.       Rudder Propeller Units ...............................................................................................................               7- 9
   H.       Lateral Thrust Units ....................................................................................................................            7- 11
   I.       Water Jet Propulsion Systems .....................................................................................................                   7- 11
   J.       Special Forms of Propulsion Systems .........................................................................................                        7- 12
   K.       Dynamic Positioning Systems (DP Systems) ..............................................................................                              7- 13
   L.       Cavitation Noise of Propellers ....................................................................................................                  7- 15
III - Part 1                                                          Table of Contents                                                                    Chapter 2
GL 2004                                                                                                                                                      Page 5



Section 8              Torsional Vibrations
   A.          General ........................................................................................................................................   8-   1
   B.          Calculation of Torsional Vibrations ............................................................................................                   8-   1
   C.          Permissible Torsional Vibration Stresses ...................................................................................                       8-   2
   D.          Torsional Vibration Measurements .............................................................................................                     8-   5
   E.          Prohibited Ranges of Operation ..................................................................................................                  8-   5
   F.          Auxiliary Machinery ...................................................................................................................            8-   5


Section 9              Machinery for Ships with Ice Classes
   A.          General ........................................................................................................................................    9- 1
   B.          Requirements for Notation E ......................................................................................................                  9- 1


Section 10             Spare Parts
   A.          General ........................................................................................................................................   10- 1
   B.          Volume of Spare Parts ................................................................................................................             10- 1
III - Part 1                                                                       Index                                                                      Chapter 2
GL 2004                                                                                                                                                         Page 7



                                                                                    Index


                                                                                        A
Accessibility .......................................................................................................................................................... 2-6
     diesel engines ................................................................................................................................................... 3-1
Acoustic capsule .................................................................................................................................................... 4-4
Air blow-out device ............................................................................................................................................... 7-2
Alarm ..................................................................................................................................................... 2-6, 3-19, 4-5
Ambient conditions ......................................................................................................................................... 1-4, 3-1
Application factors ................................................................................................................................................ 6-5
Arrangement of shaft bearings ............................................................................................................................... 5-6
Auxiliary
     engines ........................................................................................................................................................... 3-19
     machinery ......................................................................................................................................................... 8-5
     systems ............................................................................................................................................................. 2-8
Availability of machinery ...................................................................................................................................... 2-2
Azimuth propulsion units ....................................................................................................................................... 2-9

                                                                                        B
Balancing ........................................................................................................................................................ 4-6, 7-8
     gear wheels, pinions, shafts, gear couplings ..................................................................................................... 6-7
Bearing ........................................................................................................................................................... 4-3, 5-6
     lubrication ........................................................................................................................................................ 5-7
Blade sections ........................................................................................................................................................ 7-5
Block diagrams ...................................................................................................................................................... 2-7
Bolts ............................................................................................................................................................... 5-5, 7-7
Bow thruster .......................................................................................................................................................... 8-5
Bulkheads .............................................................................................................................................................. 2-9

                                                                                        C
Calculation ...................................................................................................................................................... 7-5, 8-1
Characteristic values Cw ....................................................................................................................................... 7-3
Cleaning equipment ............................................................................................................................................... 4-2
Clutches ................................................................................................................................................................. 6-9
Cold overspeed test ............................................................................................................................................... 4-6
Combustion
     air ducts ............................................................................................................................................................ 4-2
     chambers .......................................................................................................................................................... 4-3
Compartment separation ........................................................................................................................................ 2-9
Chapter 2                                                                           Index                                                                      III - Part 1
Page 8                                                                                                                                                           GL 2004


Connection
     lines .................................................................................................................................................................. 2-8
     of loads .......................................................................................................................................................... 3-13
Consumables ........................................................................................................................................................ 1-11
Control .......................................................................................................................................... 2-2, 3-18, 7-9, 7-12
     safety equipment .............................................................................................................................................. 4-4
     systems ............................................................................................................................................................. 2-8
Controllable pitch propellers ................................................................................................................................. 7-7
Cooling water systems ........................................................................................................................................... 2-8
Corrosion protection .............................................................................................................................................. 2-2
Couplings ................................................................................................................................................. 5-5, 6-1, 6-8
Crankcase
     airing .............................................................................................................................................................. 3-15
     safety devices ................................................................................................................................................. 3-15
     venting ........................................................................................................................................................... 3-15
Crankshafts ..................................................................................................................................................... 3-4, 8-2
Cycloidal propellers ............................................................................................................................................. 7-12

                                                                                         D
Diesel engines, spare parts ................................................................................................................................... 10-2
Documents for approval ............................................................................ 1-3, 2-7, 3-2, 3-3, 4-1, 5-1, 6-1, 7-1, 7-14
Dynamic load factor .............................................................................................................................................. 7-6
Dynamic positioning ............................................................................................................................................ 7-13

                                                                                         E
Electric propeller drive .......................................................................................................................................... 9-2
Emergency exits .................................................................................................................................................... 2-9
Engine alignment ................................................................................................................................................. 3-19
Essential equipment ............................................................................................................................................... 1-2
Exhaust gas
     ducts ................................................................................................................................................................. 4-3
     turbochargers ................................................................................................................................................... 4-6

                                                                                         F
Factory trials .......................................................................................................................................................... 4-6
Failure Mode and Effect Analysis (FMEA) .................................................................................................. 2-7, 7-14
Fire resistance ........................................................................................................................................................ 2-9
Flange connections ................................................................................................................................................ 7-7
Flexible couplings ................................................................................................................................... 6-9, 8-4, 9-2
Form factors .......................................................................................................................................................... 8-4
III - Part 1                                                                       Index                                                                       Chapter 2
GL 2004                                                                                                                                                          Page 9


Fuel ....................................................................................................................................................... 1-11, 3-1, 4-4
     lines, return lines, shielding ........................................................................................................................... 3-16
     systems ............................................................................................................................................................. 2-8

                                                                                        G
Gas turbines ............................................................................................................................................. 4-1, 4-2, 4-4
Gears ............................................................................................................................................................. 7-10, 8-2
     couplings .......................................................................................................................................................... 6-1
     hammering ....................................................................................................................................................... 8-4
     shafts ................................................................................................................................................................ 6-6
Generator sets ........................................................................................................................................................ 6-1
Generators .................................................................................................................................................... 3-13, 8-5

                                                                                        H
Heating facilities .................................................................................................................................................... 2-8
Hydraulic ............................................................................................................................................................. 7-10
     control .............................................................................................................................................................. 7-8
     couplings .......................................................................................................................................................... 6-9

                                                                                         I
Ice class ................................................................................................................................................................. 9-1
     strengthening factor .......................................................................................................................................... 9-1
Inclinations and movements of the ship ................................................................................................................. 1-4
Indicators, actual setting of blades, c.p. propellers ................................................................................................ 7-8
Inspection covers ................................................................................................................................................... 6-7
Interconnection ...................................................................................................................................................... 2-8
Internal combustion engines .................................................................................................................................. 3-1
Irregularities in ignition ......................................................................................................................................... 8-1

                                                                                         L
Lateral thrust units ............................................................................................................................................... 7-11
Lighting ................................................................................................................................................................. 2-6
Loading condition .................................................................................................................................................. 2-8
Lubrication ............................................................................................................................................ 4-3, 6-7, 7-10
     oil systems ........................................................................................................................................................ 2-8

                                                                                        M
Maintenance ................................................................................................................................................... 4-2, 4-6
     instructions ....................................................................................................................................................... 2-5
Manoeuvrability .................................................................................................................................................... 2-7
Manoeuvring ................................................................................................................................................. 2-3, 7-12
     qualities ............................................................................................................................................................ 2-7
Chapter 2                                                                          Index                                                                      III - Part 1
Page 10                                                                                                                                                         GL 2004


Materials ......................................................................................................... 1-10, 2-1, 3-4, 4-1, 5-1, 7-1, 7-9, 7-11
Measurements ........................................................................................................................................................ 8-5
Minimum speed ..................................................................................................................................................... 2-7
Model tests ..................................................................................................................................................... 2-7, 2-8
Monitoring equipment .................................................................................................................................... 2-5, 4-5
Multiple shaft systems ........................................................................................................................................... 2-3
     multi-engine systems ........................................................................................................................................ 2-3

                                                                                        N
Noise ............................................................................................................................................................... 2-6, 7-2

                                                                                        O
Operating ............................................................................................................................................................... 2-5
     conditions ......................................................................................................................................................... 1-4
     instructions ....................................................................................................................................................... 2-5
Oral communication .............................................................................................................................................. 2-6

                                                                                         P
Partition ................................................................................................................................................................. 2-9
     bulkhead ........................................................................................................................................................... 2-8
Percentage area of contact - gear teeth .................................................................................................................. 6-8
Pitch control mechanism ........................................................................................................................................ 7-8
Podded drives ...................................................................................................................................................... 7-13
Power diagram ....................................................................................................................................................... 3-1
Preheating .............................................................................................................................................................. 2-8
Pressure
     gauges .............................................................................................................................................................. 2-6
     temperature control .......................................................................................................................................... 6-7
     tightness tests ................................................................................................................................................... 4-6
Pressure tests ......................................................................................................................................................... 3-8
Prohibited ranges of operation ............................................................................................................................... 8-5
Propellers ........................................................................................................................................................ 7-1, 9-2
     mounting ................................................................................................................................................... 7-6, 9-2
     partially submerged ........................................................................................................................................ 7-13
     shaft protection ................................................................................................................................................ 5-4
     shafts ................................................................................................................................................................ 9-1
     singing .............................................................................................................................................................. 7-2
Protective measures ............................................................................................................................................. 1-11
Pumps .................................................................................................................................................................... 7-8
III - Part 1                                                                       Index                                                                       Chapter 2
GL 2004                                                                                                                                                         Page 11


                                                                                        Q
Quality classes of propellers .................................................................................................................................. 7-9

                                                                                        R
Redundant propulsion ............................................................................................................................................ 2-7
Resistance to seawater ........................................................................................................................................... 7-1
Rudders .................................................................................................................................................................. 2-8
     position indicators ............................................................................................................................................ 2-8
     propeller units .................................................................................................................................................. 7-9
Rules for welding ................................................................................................................................................... 2-1

                                                                                         S
Safety devices ............................................................................................................................................... 3-13, 4-5
     crankcase ........................................................................................................................................................ 3-15
     lubricating oil system ..................................................................................................................................... 3-16
Safety equipment ................................................................................................................................................. 1-11
Screw connections ................................................................................................................................................. 2-1
Sea chests .............................................................................................................................................................. 9-2
Sea trials ........................................................................................................................................... 2-2, 2-7, 2-8, 6-8
Seawater supply ..................................................................................................................................................... 2-8
Shaft
     dimensions ....................................................................................................................................................... 5-1
     liners ................................................................................................................................................................ 5-4
     made of pipes ................................................................................................................................................... 5-3
     revolution indicator .......................................................................................................................................... 2-6
     tapers and propeller nut threads ....................................................................................................................... 5-3
Shaft-driven generators .......................................................................................................................................... 8-5
Shafting ................................................................................................................................................................. 5-1
Shielding .............................................................................................................................................................. 3-16
Shipboard trials .................................................................................................................................... 3-12, 4-6, 7-10
Shrink joints, built-up crankshaft ........................................................................................................................... 3-4
Shrunk joints .......................................................................................................................................................... 9-1
Sigma n – CTh - diagram ..................................................................................................................................... 7-16
Size factor .............................................................................................................................................................. 7-5
Spare parts ........................................................................................................................................................... 10-1
Speed control - diesel engine ............................................................................................................................... 3-13
Split crankshafts .................................................................................................................................................... 3-4
Standby units ......................................................................................................................................................... 2-8
Starting air supply systems .................................................................................................................................... 2-8
Starting equipment ........................................................................................................................................ 3-18, 4-3
Chapter 2                                                                          Index                                                                      III - Part 1
Page 12                                                                                                                                                         GL 2004


Steering

     gear .................................................................................................................................................................. 9-2

     systems ............................................................................................................................................................. 2-8

Stern tube

     bearings ............................................................................................................................................................ 5-6

     connections ...................................................................................................................................................... 5-7

Supercavitating propellers ................................................................................................................................... 7-13

Survivability ................................................................................................................................................. 1-2, 1-12

                                                                                         T
Tapered mounting .................................................................................................................................................. 7-6

Tests .............................................................................. 2-2, 2-7, 2-9, 3-5, 3-8, 4-6, 5-7, 6-8, 6-10, 7-10, 7-11, 7-14

Thermal turbomachinery ....................................................................................................................................... 4-1

Tooth couplings ..................................................................................................................................................... 6-8

Torque converters .................................................................................................................................................. 6-9

Torsional vibration stresses ................................................................................................................................... 8-3

     alternating torque ............................................................................................................................................. 8-1

     permissible ....................................................................................................................................................... 8-2

Turning appliances ................................................................................................................................................ 2-5

Turning gear .......................................................................................................................................................... 4-3

                                                                                        U
Uninterrupted power supply systems (UPS) .......................................................................................................... 2-8

                                                                                        V
Values, for various profile shapes ......................................................................................................................... 7-4

Ventilation ...................................................................................................................................................... 2-6, 2-9

Ventilation ............................................................................................................................................................. 2-9

Vibrations ....................................................................................................................................................... 1-4, 4-4

                                                                                        W
Water jets ............................................................................................................................................................. 7-11

Watertight

     bulkheads ......................................................................................................................................................... 2-9

     doors ................................................................................................................................................................ 2-9

Weather conditions ................................................................................................................................................ 2-7

				
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