2 Definitions
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Statutory Documents - IMO Publications and Documents - Circulars - Maritime Safety Committee - MSC.1/Circular.1369 – Interim Explanatory Notes for the Assessment of Passenger Ship Systems' Capabilities After a Fire or Flooding Casualty– (22 June 2010)1 - Annex – Interim Explanatory Notes for the Assessment of Passenger Ship Systems Capabilities After A Fire or Flooding Casualty - 2 Definitions

2 Definitions

 For the purpose of these Interim Explanatory Notes, the following definitions apply:

  2.1 Passenger ship systems' capabilities after a fire or flooding casualty (short: ship systems' capabilities) are those required for passenger ships according to SOLAS regulations II-1/8-1, II-2/21 and II-2/22. The ship systems' capabilities are addressing:

  • .1 availability of essential systems after a flooding casualty, according to SOLAS regulation II-1/8-1;

  • .2 availability of essential systems to support a ship's safe return to port under its own propulsion after a fire casualty, according to SOLAS regulation II-2/21.4 (including functional requirements for safe areas according to SOLAS regulation II-2/21.5); and

  • .3 availability of essential systems to support a ship's evacuation and abandonment after a fire casualty, according to SOLAS regulation II-2/22.

  2.2 Passenger ship systems' design (short: ship systems' design) is a design description of systems intended to be installed, including all essential information showing how to achieve the ship systems' capabilities after a fire or flooding casualty according to SOLAS regulations II-1/8-1, II-2/21 and II-2/22.

  2.3 Passenger ship systems' functionality (short: ship systems' functionality) is part of the passenger ship systems' design and defines how the onboard systems achieve the functional requirements defined in SOLAS regulations II-2/21 and II-2/22.

  2.4 Fire casualty is any possible fire case on board the ship under consideration. Fire casualties may or may not exceed the casualty threshold stipulated in SOLAS regulation II-2/21.3.

  2.5 Flooding casualty is any possible flooding cases on board the ship under consideration. Flooding casualties may not exceed a single watertight (WT) compartment flooding as stated in SOLAS regulation II-1/8-1.2.

  2.6 Essential systems are all systems and those sections of systems in spaces not directly affected by the casualty that need to remain operational after a fire or flooding casualty, according to SOLAS regulations II-2/21.4 and II-2/22.3, and as referred to in SOLAS regulation II-1/8-1.2.

  2.7 Critical systems are essential systems that were identified in the overall assessment of essential systems to have a possibility to fail to operate adequately as a consequence of one or more fire casualty case, each not exceeding the fire casualty threshold, or as a consequence of one or more flooding case, each not exceeding a single WT compartment. The failure of the system may be caused by a failure of the whole system, of one component or of a connection between system components or by any other failure causing unsatisfactory operation of the essential system under consideration.

Parent topic: Annex – Interim Explanatory Notes for the Assessment of Passenger Ship Systems Capabilities After A Fire or Flooding Casualty
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