static Mark 63 Plod O, Bureau of Naval Weapons LD 479921 and Mark 63 Mod 1, Bureau of Naval Weapons U) 545490, for test and evaluation purposes. The Switch, Hydrostatic, Mark 63 Mod O is an integral.of and in itiates the switch delay
action of the Switch of Naval Wea ons w) and iD 496474. The Switch
integral part of the Switch Delay Nark 64 Mod 3.