SAFETY OF LIFE AT SEA C43 



(ii) The frames of vertical watertight doors shall have no groove at 

 the bottom in which dirt might lodge and prevent the door closing properly. 



(iii) All cocks and valves for sea inlets and discharges below the bulk- 

 head deck and all fittings outboard of such cocks and valves shall be made of 

 steel, bronze or other approved ductile material. Ordinary cast iron or 

 similar materials shall not be used. 



(b) Each watertight door shall be tested by water pressure to a head up to 

 the bulkhead deck. The test shall be made before the ship is put in service, 

 either before or after the door is fitted. 



Regulation 16 



Construction and Initial Tests of Watertight Decks, Trunks, &c. 



(a) Watertight decks, trunks, tunnels, duct keels and ventilators shall 

 be of the same strength as watertight bulkheads at corresponding 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 bulkhead 

 deck. 



(b) After completion, a hose or flooding test shall be applied to water- 

 tight decks and a hose test to watertight trunks, tunnels and ventilators. 



Regulation 17 



Watertight Integrity above the Margin Line 



(a) The Administration may require that all reasonable and practicable 

 measures shall be taken to limit the entry and spread of water above the 

 bulkhead deck. Such measures may include partial bulkheads or webs. 

 When partial watertight bulkheads and webs are fitted on the bulkhead deck, 

 above or in the immediate vicinity of main subdivision bulkheads, they 

 shall have watertight shell and bulkhead deck connections so as to restrict 

 the flow of water along the deck when the ship is in a heeled damaged 

 condition. Where the partial watertight bulkhead does not line up with 

 the bulkhead below, the bulkhead deck between shall be made effectively 

 watertight. 



r (b) The bulkhead deck or a deck above it shall be weathertight in the 

 sense that in ordinary sea conditions water will not penetrate in a downward 

 direction. All openings in the exposed weather deck shall have coamings 

 of ample height and strength and shall be provided with efficient means 



Ch. 2 



