39.—(1) A ship shall be provided with a bilge pumping system so that water entering any part of the hull, other than a space permanently appropriated for the carriage of fresh water, water ballast, oil fuel or liquid cargo and for which other efficient means of pumping or drainage are provided, can be pumped out through at least one suction pipe when the ship is on even keel or is listed not more than 5 degrees either way. Efficient means shall be provided whereby water may easily flow to the suction pipes.
(2) A new ship shall be provided with a bilge pumping system as set out below:
(a)
the new ship which is less than 24 metres in length shall be provided with a hand pump and bailers. The capacity of the pump shall not be less than 5.5 cubic metres per hour;
(b)
the new ship which is 24 metres or more in length shall be provided with one power bilge pump and a hand pump. The capacity of the power pump shall not be less than 11 cubic metres per hour and the hand pump, 5.5 cubic metres per hour;
(c)
the least internal diameter of bilge suction pipes is to be that of the nearest commercial size within 6 millimetres of the diameter determined by the following equations.
Main Line — For the diameter of main-bilge-line suctions and direct bilge suction to pumps:
Branch Line — For the equivalent diameter of the combined branch suctions to a compartment:
where d = internal diameter of pipe in millimetres
L = length of ship in metres
B = breadth of ship in metres
D = moulded depth to main deck in metres
C = length of compartment in metres.
(3) (a) (i) Every bilge pump provided in a ship shall have an efficient means of priming.
(ii) A power pump or its source of power shall not be installed forward of the collision bulkhead.
(iii) A hand bilge pump on the ship shall be workable from above the bulkhead deck.
(b) (i) In the ship all pipes from the pumps for draining cargo spaces or any part of the machinery space shall be distinct from pipes which may be used for filling or emptying spaces in which water or oil is carried.
(ii) Bilge suction pipes shall not be led through oil, fresh water tanks and double bottom tanks unless approved by the Director.
(iii) In a ship which carries more than 150 passengers the bilge and ballast pumping systems shall be so designed as to prevent water passing from the sea or from water ballast spaces into the cargo spaces or into the machinery space or from one watertight compartment to another. Provision shall be made to prevent the compartments served by any bilge suction pipes from being flooded when any other compartment is damaged.
(4) Details and arrangements of cocks, valves, bilge pipes and boxes are to be approved by the Director.
(5) The bilge pumping system for an existing ship shall be to the satisfaction of the Director.