Hull Construction Regulations (C.R.C., c. 1431)

15 (1) In every ship efficient means shall be provided for closing and making watertight all openings in bulkheads and other structures required to be watertight.

(2) Every door fitted to any such opening shall be a sliding watertight door, provided that, in a ship that is not required by section 9 of Schedule I to have a factor of subdivision of 0.5 or less, hinged watertight doors may be fitted

• (a) in passenger, crew and working spaces above any deck the underside of which at its lowest point is at least 2.13 m above the deepest subdivision load water line; and

• (b) in any bulkhead, not being a collision bulkhead, that divides two cargo between deck spaces; for such cases a notice shall be posted in the Chart Room stating that these doors shall be closed before the voyage commences and shall be kept closed during navigation; similar notices shall be posted at the doors, on each side of the bulkhead.

(2.1) The master and persons in charge of the navigation and engine room watches shall ensure that the doors fitted in accordance with paragraph (2)(b) are closed before the voyage commences and are kept closed during navigation, and the master shall ensure that the notices to this effect required by that paragraph are posted in the Chart Room and at the doors on each side of the bulkhead.

(3) Hinged watertight doors shall be fitted with catches capable of being worked from each side of the bulkhead in which the door is fitted.

(4) All doors required to be watertight shall be secured by means other than bolts, and shall be closed by means other than gravity or a dropping weight.

(5) Watertight doors fitted in bulkheads between permanent and reserve bunkers, other than the doors referred to in subsection 16(3), shall always be accessible.