Large Fishing Vessel Inspection Regulations

18 Before a steel fishing vessel is launched, the compartments within the main hull shall, before the cementing is commenced, be subjected to hose or pressure tests as follows:

• (a) double bottoms that are not to be used for the carrying of oil shall be tested to a head of water equal to the maximum head that can be experienced in service;

• (b) deep tanks and peak tanks used for carrying water, and deep tanks and double bottom tanks arranged for carrying oil fuel shall be tested to a head of water equal to the maximum head to which the tanks can be subjected in service, but not less than 2.44 m above the crown of the tanks where the moulded depth to the strength deck exceeds 4.88 m, and 915 mm where the moulded depth does not exceed 3.05 m; intermediate heads may be obtained by interpolation between 4.88 and 3.05 m;

• (c) peak bulkheads that do not form the boundaries of tanks shall be tested by filling the peaks with water to the level of the load water line;

• (d) watertight bulkheads, including recesses and watertight flats, watertight tunnels, weatherdecks and waterways, shall be hose tested; the pressure of water in the hose shall not be less than 207 kPa;

• (e) watertight doors shall be tried under working conditions and hose tested; the pressure in the hose shall not be less than 207 kPa.