1.1 This International Standard specifies the general design characteristics of mud boxes used between pumps and bilge suctions in machinery spaces and tunnels for the coarse filtration of bilge water. 1.2 This International Standard does not specify the design dimensions nor the materials of mud boxes. 1.3 This International Standard applies to deep sea ships and inland navigation ships. NOTE — Users should note that while observing the requirements of this International Standard, they should at the same time ensure compliance with such statutory requirements, rules and regulations as may be applicable to the individual ship concerned.