Article 25 Cooling water systems—vessels of 24.4 metres in length and over

In every vessel of 24.4 metres in length and over to which these Rules apply where machinery essential for the propulsion and safety of the vessel is dependent for its operation on an efficient cooling water system, there shall be provided at least one circulating pump and, except in the case of any emergency generator, provision shall be made so that in the event of the failure of the pump an alternative pump is available for the same duty. These pumps shall provide an adequate supply of cooling water to the cooling system.

In every such vessel the sea water suctions of cooling systems for essential internal combustion machinery shall be provided with strainers which can be cleaned without interruption of the supply of water.

In every such vessel provision shall be made to prevent overpressure in any part of the system and to indicate the proper working of the system.