Used on los angeles class ssn (688); forrestal class cv; austin ship class lpd-4 amphibious transport docks; nimitz class cvn; seawolf class ssn; oliver perry class ffg; spruance class dd (963); arleigh burke class ddg; owhatan class t-atf 166; ticonderoga class cg (47). 1.385" overall length 1.385" overall width weapon system essential