Section 16 Steering systems
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Naval Ships, January 2023 - Volume 2 Machinery and Engineering Systems - Part 1 General Requirements - Chapter 3 Requirements for Design, Construction, Installation and Sea Trials of Engineering Systems - Section 16 Steering systems

Section 16 Steering systems

Parent topic: Chapter 3 Requirements for Design, Construction, Installation and Sea Trials of Engineering Systems

16.1 Design

16.1.1 For details of design requirements, see Vol 2, Pt 6, Ch 1 Steering Gear

16.2 Construction

16.2.1 The requirements of the Rules relating to the testing of Class I pressure vessels, piping and related fittings including hydraulic testing apply.

16.3 Type testing

16.3.1 Each type of power unit pump is to be subjected to a type test. The type test is to be for a duration of not less than 100 hours, the test arrangements are to be such that the pump may run in idling conditions, and at maximum delivery capacity at maximum working pressure. During the test, idling periods are to be alternated with periods at maximum delivery capacity at maximum working pressure. The passage from one condition to another should occur at least as quickly as on board. During the whole test no abnormal heating, excessive vibration or other irregularities are permitted. After the test, the pump is to be opened out and inspected. Type tests may be waived for a power unit which has been proven to be reliable in marine service.

16.4 Testing

16.4.1 After installation on board, the steering unit is to be subjected to the applicable hydrostatic and running tests.

16.4.2 The steering system is to be demonstrated to show that the requirements of the Rules have been met. The trial is to include the operation of the following:

  1. The steering system, including demonstration of the functional performances.

  2. The steering power units, including transfer between steering power units.

  3. The isolation of one power actuating system, checking the time for regaining steering capability.

  4. The hydraulic fluid recharging system (may be effected at the dockside).

  5. The alternative power supply and emergency hand pump operation.

  6. The steering controls, including transfer of control and local control.

  7. The means of communication between the steering compartment and the wheelhouse; also, the engine room, if applicable (may be effected at the dockside).

  8. The alarms and indicators (may be effected at the dockside).

  9. Where the steering system is designed to avoid hydraulic locking, this feature is to be demonstrated (may be effected at the dockside).

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