Section 52

the design, materials and construction of all watertight doors, side-scuttles, gangway, cargo and coaling ports, valves, pipes, ash-chutes and rubbish-chutes referred to in these Regulations shall be to the satisfaction of the Director; and

{b)

the frames of vertical watertight doors shall have no groove at the bottom in which dirt might lodge and prevent the door closing properly.

(2}

In passenger ships and cargo ships each watertight door shall be tested by water pressure to a head up to the bulkhead deck or freeboard deck respec-tively. The test shall be made before the ship is put into service, either before or after the door is fi.tted.

.'

Construction and initial tests of watertight decks, trunks etc. in passenger ships and cargo ships.