1969 Ed.]
Merchant Shipping (Fire Appliances) Regulations.
[CAP. 281
H 19
[Subsidiary]
the conditions and at the pressure specified in regulation 33, which shall not be less than the quantity obtained from the following formula-
Quantity of water in tons per hour Cd2
Where-
(i) C = 5 for ships required to be provided with more than one fire pump (excluding any emergency fire pump) and C = 2.5 for ships required to be provided with only one fire pump, and
(ii) d = 1 + L(B+D)/2500 to the nearest 1; and
where---
L = length of the ship in feet on the summer load waterline from the fore side of the stem to the after side of the rudder post. Where there is no rudder post, the length is measured from the fore side of the stem to the axis of the rudder stock. For ships with cruiser sterns, the length shall be taken as 96 per centum of the total length on the designed summer load waterline or as the length from the fore side of the stem to the axis of the rudder stock if that be the greater;
B = greatest moulded breadth of the ship in feet; and
D = moulded depth of the ship in feet measured to the bulkhead deck amidships:
Provided that in any such ship the total capacity of the fire pumps for fire fighting purposes shall not be required to exceed 180 tons per hour.
(3) Every fire pump required by these regulations to be operated by power shall, except as expressly provided otherwise in these regulations, be operated by a means other than the ship's main engines.
(4) Fire pumps provided in compliance with these regulations may be sanitary, ballast, bilge or general service pumps provided that they are not normally used for pumping oil and that if they are subject to occasional duty for the transfer or pumping of oil, suitable change-over arrangements are fitted and operating instructions are conspicuously displayed at the change-over position.
(5) In every ship to which these regulations apply which is required by these regulations to be provided with more than one fire pump operated by power (other than any emergency pump) every such fire pump shall have a capacity of not less than 80 per centum of the total capacity of the fire pumps required by paragraphs (1) and (2) divided by the number of fire pumps required by these regulations to be provided in the ship: