5.1 SOLAS regulation
II-1/13 (previous SOLAS regulation II-1/15) provides the technical
standards for watertight doors in passenger ships constructed on or
after 1 February 1992. The basis of this regulation is that all watertight
doors shall be kept closed during navigation according to SOLAS regulation II-1/22.1 (previous SOLAS
regulation II-1/15.9.1), except as follows:
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.1 watertight doors may be opened during navigation
to permit the passage of passengers or crew, or when work in the immediate
vicinity of the door necessitates it being opened. The door must be
immediately closed when transit through the door is complete or when
the task which necessitated it being open is finished; and
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.2 certain watertight doors may be permitted to
remain open during navigation only if considered absolutely necessary
according to SOLAS regulation II-1/22.4 (previous
SOLAS regulation II-1/15.9.3); that is, being open is determined essential
to the safe and effective operation of the ship's machinery or to
permit passengers normally unrestricted access throughout the passenger
area. Such determination shall be made by the Administration only
after careful consideration of the impact on ship operations and survivability.
A watertight door permitted to remain open shall be clearly indicated
in the ship's stability information and shall always be ready to be
immediately closed.
5.2 For passenger ships constructed before 1 February
1992, watertight doors that do not comply with SOLAS regulations II-1/13.5.1 to 13.5.3 and 13.6 (previous
SOLAS regulations II-1/15.6.1 to 15.6.4) shall be closed before the
voyage commences and shall be kept closed during navigation. In other
words, such doors shall never be permitted to be opened during a voyage.
Administrations may use the watertight door checklist in appendix
2 to assess pre-1992 ships for potential compliance with SOLAS regulations II-1/13.5.1 to 13.5.3
and 13.6 (previous SOLAS regulations 15.6.1 to 15.6.4), which also
includes the requirements in paragraph 7 of SOLAS regulation II-1/13 (previous SOLAS
regulation II-1/15).