11.—(1) Every entrance into the crew accommodation from the open deck shall be so situated and constructed as to be protected against the weather and sea to the greatest extent practicable. The entrances shall be so situated that the crew accommodation is accessible at all times and in all weathers.
(2) Two entirely separate escape routes shall be provided for each compartment, each route leading from the compartment to a suitably sited opening (which may be a normally used entrance) on to a weather deck. The escape routes, which shall not pass through propelling machinery spaces, galleys or other spaces where the risk of injury from fire, steam or other similar cause is comparatively high, shall be so arranged as to provide a ready and unimpeded means of escape from each compartment to the vessel's boats, lifeboats or liferafts. Where escape routes are by way of stairways or ladderways, those stairways or ladderways shall be constructed of steel.
(3) In paragraph (2) “compartment” means