Large Fishing Vessel Inspection Regulations — 14
14 (1) Not less than two power driven bilge pumps shall be provided of which pumps at least two shall be driven by separate prime movers, one of which may be the main engines, and it shall be possible to operate all the pumps simultaneously. (2) The minimum total power bilge pumping capacity and the minimum internal diameter of the suction and discharge bilge piping for ships of various lengths shall be as set out in Table I of Schedule IX, but for ships of intermediate lengths the total minimum power pump capacity and minimum internal diameter of the bilge piping shall be found by interpolation. (3) No power bilge pump provided in compliance with this section shall have a capacity of less than 25 per cent of the total capacity required, and at least one power bilge pump independent of the main engines shall have a capacity of not less than 50 per cent of the total required. (4) Subject to subsection (6), bilge suctions, piping and means for drainage shall be so arranged that any water that may enter a watertight compartment can be pumped out by each of the power bilge pumps required by this section when the vessel is on an even keel and is either upright or has a list of not more than five degrees. (5) In addition to the requirements of subsection (4), a direct bilge suction shall be fitted in the machinery space to a power pump independent of the main engines and this pump (a) may be one of the bilge pumps, (b) may be a main circulating pump, (c) may be any pump other than the pumps referred to in paragraphs (a) and (b), (d) shall have a capacity of not less than 50 per cent of the total power pump capacity required by this section, and this additional bilge suction shall be so arranged that it can be operated independently of the main bilge system. (6) The following compartments may, if not used for carrying water ballast, be provided with bilge drainage arrangements as follows: (a) in the case of compartments situated forward of the collision bulkhead, with a manual pump; (b) in the case of compartments situated forward of the collision bulkhead on fishing vessels that have a watertight bulkhead between the collision and machinery space bulkheads, with a manual pump or with a drain cock secured to the collision bulkhead and operated from above the main deck; (c) in the case of watertight compartments that overhang the thrust shaft recess, with a manual pump or with a self-closing drain cock operated from the engine room; and (d) in the case of compartments situated aft of the after peak bulkhead, with a manual pump or with a self-closing drain cock operated from the engine room or from above the main deck. (7) Power pumps that are essential for bilge service shall be self-priming or so installed that they can be primed from the sea without flooding the bilges. (8) Manual pumps, fitted in compliance with this section, shall (a) have a capacity of not less than 1.14 L/s; (b) be fitted with a suction pipe having an internal diameter of not less than 50 mm; and (c) be so located that they can at all times be operated from a position above the load water line. (9) Drain cocks fitted in compliance with this section shall have an internal diameter of not less than 38 mm and be so arranged as to be accessible at all times. (10) Each bilge branch suction line, except hand pumps with only one suction, shall be fitted with a stop valve that is readily accessible at all times. (11) Where a bilge pump is fitted with a connection to the sea, a non-return valve or swing check valve that is readily accessible at all times shall be fitted between the sea connection and the bilge main so that sea water cannot flow into the bilges when the sea connection and bilge valves are open. (12) Bilge suctions that lead into crew spaces or engine rooms shall be fitted with strainers, and the area of the openings of such strainers shall be not less than twice the cross-sectional area of the bilge pipe. (13) Subject to subsection (14), the piping for bi