(1) Except for ships subject to Part III, every watertight door required to maintain the watertight integrity of a bulkhead, shall be made of suitable material and shall be efficiently constructed for its intended duty.
(2) (a) Every watertight door of the sliding type shall be capable of being operated by efficient hand operated gear both at the door itself and from an accessible position above the bulkhead deck.
(b) The operating gear for operating from above the bulkhead deck any sliding watertight door fitted in the bulkhead of a machinery space shall be situated outside the machinery space.
(3) Where there is access from the lower part of a machinery space to a watertight shaft tunnel the access opening shall be provided with a sliding watertight door which shall be capable of being operated locally from both sides of the door.
(4) Means shall be provided at remote operating positions to indicate when a sliding door is closed.
(5) Watertight doors shall be capable of being operated when the ship is listed up to 15 degrees either way
Tests of watertight doors
11. Each watertight door shall be tested by water pressure equivalent to the head up to the freeboard deck. The test shall be made before the ship is put into service, either before or after the door is fitted.