Section 6 Testing and trials
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Ships, July 2022 - Part 5 Main and Auxiliary Machinery - Chapter 22 Propulsion and Steering Machinery Redundancy - Section 6 Testing and trials

Section 6 Testing and trials

Parent topic: Chapter 22 Propulsion and Steering Machinery Redundancy

6.1 Sea trials

6.1.1 In addition to the requirements for sea trials in Pt 5, Ch 1, 5.2 Sea trials, trials are to be carried out to demonstrate that when the ship is operating 50 per cent of the prime mover capacity and 50 per cent of the installed propulsion systems, a speed of not less than 7 knots can be maintained with adequate steering capability, where required by the respective class notations.

6.1.2 Trials are to be carried out to demonstrate the ship's steering capability in accordance with the assessment required by Pt 5, Ch 22, 1.2 Plans and information 1.2.4 with one steering system out of action.

6.1.3 Where the FMEA report has identified the need to prove the conclusions, testing and trials are to be carried out as necessary to investigate the following:

  1. The effect of a specific component failure.

  2. The effectiveness of automatic/manual isolation systems.

  3. The behaviour of any interlocks that may inhibit operation of essential systems.

6.1.4 During sea trials, the operational envelope(s) is to be determined under the conditions detailed in Pt 5, Ch 22, 3.1 Main propulsion machinery 3.1.1 and/or Pt 5, Ch 22, 3.2 Steering machinery 3.2.1, as required for the class notation.

Copyright 2022 Clasifications Register Group Limited, International Maritime Organization, International Labour Organization or Maritime and Coastguard Agency. All rights reserved. Clasifications Register Group Limited, its affiliates and subsidiaries and their respective officers, employees or agents are, individually and collectively, referred to in this clause as 'Clasifications Register'. Clasifications Register assumes no responsibility and shall not be liable to any person for any loss, damage or expense caused by reliance on the information or advice in this document or howsoever provided, unless that person has signed a contract with the relevant Clasifications Register entity for the provision of this information or advice and in that case any responsibility or liability is exclusively on the terms and conditions set out in that contract.