TREATIES Watertight doors, sidescuttles, etc. Construction and initial tests. Watertight decks, trunks, etc. Construction and initial tests. Watertight doors, etc. Periodical opera- tion and inspection. and secured watertight before the ship leaves port, and shall be kept closed during navigation. Cargo and coaling ports which are to be fitted partly or entirely below the deepest subdivision loadline shall receive the special con- sideration of the Administration. (12.) The inboard opening of each ash-shoot, rubbish-shoot, &c., shall be fitted with an efficient cover. If the inboard opening is situated below the margin line, the cover shall be watertight, and in addition an automatic non-return valve shall be fitted in the shoot in an easily accessible position above the deepest subdivision loadline. When the shoot is not in use both the cover and the valve shall be kept closed and secured. REGULATION XI. Construction and Initial Tests of Watertight Doors, Sidescuttles, &c. (1.) The design, materials and construction of all watertight doors, sidescuttles, gangway, cargo and coaling ports, valves, pipes, ash- shoots and rubbish-shoots referred to in these Regulations shall be to the satisfaction of the Administration. (2.) Each watertight door shall be tested by water pressure to a head up to the margin line. The test shall be made before the ship is put in service, either before or after the door is fitted. REGULATION XII. Construction and Initial Tests of Watertight Decks, Trunks, &c. (1.) Watertight decks, trunks, tunnels, duct keels and ventilators shall be of the same strength as watertight bulkheads at correspond- ing levels. The means used for making them watertight, and the arrangements adopted for closing openings in them, shall be to the satisfaction of the Administration. Watertight ventilators and trunks shall be carried at least up to the margin line. (2.) After completion a hose or flooding test shall be applied to watertight decks and a hose test to watertight trunks, tunnels and ventilators. REGULATION XIII. Periodical Operationand Inspection of Watertight Doors, &c. In all new and existing ships drills for the operating of watertight doors, sidescuttles, valves, and closing mechanisms of scuppers, ash- shoots and rubbish-shoots, shall take place weekly. In ships in which the voyage exceeds one week in duration a complete drill 1214
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