Clasification Society Rulefinder 2020 - Version 9.33 - Fix
Statutory Documents - MCA Publications - LY3 - The Large Commercial Yacht Code - 4 Construction and Strength - 4.3 Watertight Bulkheads

4.3 Watertight Bulkheads

  Section 11 of the Code deals with subdivision and damage stability requirements which will determine the number and positioning of watertight bulkheads defined below.

  4.3.1 Watertight bulkheads should be fitted in accordance with the following requirements:

  • .1 The strength of watertight bulkheads and their penetrations, and watertight integrity of the division should be in accordance with the requirements of one of the Classification Societies referred to in the National Annex.

  • .2 Generally, openings in watertight bulkheads should comply with the standards required for passenger vessels, as defined in SOLAS Chapter II-1. Hand operation from above the bulkhead deck and a hydraulic accumulator may be omitted if each door has its own individual powerpack electrically driven via the emergency switchboard, and control voltage from emergency battery, and each door can be operated manually at the door. Edge strips which stop the door closing on contact are not permitted.

  • .3 Approved hinged doors may be provided for infrequently used openings in watertight compartments, where a crew member will be in immediate attendance when the door is open at sea. Audible and visual alarms should be provided in the wheelhouse.

  • .4 Unless otherwise required by section 4.4, watertight doors in yachts under 500GT may be approved hinged doors provided that there is an audible and visual alarm on the Bridge indicating when the door is open. The doors are to be kept closed at sea and marked accordingly. A time delay for the alarm is acceptable.

  • .5 Procedures for the operation of watertight doors should be agreed with the Administration and posted in suitable locations. Watertight doors should be normally closed, with the exception of sliding watertight doors providing the normal access to frequently used living and working spaces. Additionally when an access is unlikely to be used for lengthy periods, the door should also be closed. All watertight doors should be operationally tested before a ship sails and once a week.

Parent topic: 4 Construction and Strength
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