(1) The number of openings in watertight bulkheads
as required by regulation 1(3),
shall be reduced to the minimum compatible with the general arrangements
and operational needs of the vessel; openings shall be fitted with
watertight closing appliances to the satisfaction of the Administration.
Watertight doors shall be of an equivalent strength to the adjacent
unpierced structure.
(2) In vessels of less than 45 m in length, such
doors may be of the hinged type, which shall be capable of being operated
locally from each side of the door and shall normally be kept closed
at sea A notice shall be attached to the door on each side to state
that the door shall be kept closed at sea.
(3) In vessels of 45 m in length and over, watertight
doors shall be of the sliding type in:
-
(a) spaces where it is intended to open them at
sea and if located with their sills below the deepest operating waterline,
unless the Administration considers it to be impracticable or unnecessary
taking into account the type and operation of the vessels; and
-
(b) the lower part of a machinery space where
there is access from it to a shaft tunnel.
Otherwise watertight doors may be of the hinged type.
(4) Sliding watertight doors shall be capable
of being operated when the vessel is listed up to 15° either way
(5) Sliding watertight doors whether manually
operated or otherwise shall be capable of being operated locally from
each side of the door, in vessels of 45 m in length and over these
doors shall also be capable of being operated by remote control from
an accessible position above the working deck except when the doors
are fitted in crew accommodation spaces.
(6) Means shall be provided at remote operating
positions to indicate when a sliding door is open or closed.