1.1 This specification covers gongs for use on ships 100 m or more in length, as required by International Regulations (see Appendix X1). 1.2 For consistency with International Regulations, all measurements are in SI un This specification covers gongs for use on ships of certain length, as required by International Regulations. The gong cylinder, brackets, clapper rod, "U" bracket, washers, and clapper support pin shall be made of stainless steel. The clapper mass sha