C38 



SAFETY OF LIFE AT SEA 



i 



above the bulkhead deck, with an all round crank motion or some other 

 movement providing the same guarantee of safety and of an approved type. 

 Provision shall be made to give warnings by sound signal that the door has 

 begun to close and will continue to move until it is completely closed. The 

 door shall take a sufficient time to close to ensure safety. 



(ii) There shall be at least two independent power sources capable 

 of opening and closing all the doors under control, each of them capable of 

 operating all the doors simultaneously. The two power sources shall be 

 controlled from the central station on the bridge provided with all the 

 necessary indicators for checking that each of the two power sources is capable 

 of giving the required service satisfactorily. 



(iii) In the case of hydraulic operation, each power source shall consist 

 of a pump capable of closing all doors in not more than 60 seconds. In 

 addition, there shall be for the whole installation hydraulic accumulators of 

 sufficient capacity to operate all the doors at least three times, i.e., closed- 

 open — closed. The fluid used shall be one which does not freeze at any of 

 the temperatures liable to be encountered by the ship during its service. 



0') (i) Hinged watertight doors (Class 1) in passenger, crew and working 

 spaces are only permitted above a deck the underside of which, at its lowest 

 point at side, is at least 7 feet (or 2- 13 metres) above the deepest subdivision 

 loadline. 



(ii) Watertight doors, the sills of which are above the deepest loadline 

 and below the line specified in the preceding sub-paragraph shall be sliding 

 doors and may be hand operated (Class 2), except in vessels engaged on short 

 international voyages and required to have a factor of subdivision of • 50 or 

 less in which all such doors shall be power operated. When trunkways in 

 connection with refrigerated cargo and ventilation or forced draught ducts are 

 carried through more than one main watertight subdivision bulkhead, the 

 doors at such openings shall be operated by power. 



{k) (i) Watertight doors which may sometimes be opened at sea. and 

 the sills of which are below the deepest subdivision loadline shall be sliding 

 doors. The following rules shall apply: — 



(1) when the number of such doors (excluding doors at entrances to shaft 

 tunnels) exceeds five, all of these doors and those at the entrance 

 to shaft tunnels or ventilation or forced draught ducts, shall be power 

 operated (Class 3) and shall be capable of being simultaneously 

 closed from a central station situated on the bridge; 



Ch. 2 



