ASTM International - ASTM F957-91(2001)
Standard Specification for Gong, Sound Signaling
|Publication Date:||15 March 1991|
|ICS Code (Navigation and control equipment):||47.020.70|
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 units.