Grayback-class submarine
…Vehicles and other equipment used by the SEALs and Marine Force Recon units. Boats in class Name Hull number Builder Laid down Launched Commissioned Fate Grayback SSG-574 Mare Island Naval Shipyard 1 July 1954 2 July 1957 7 March 1958 Decommissioned 25 May 1964, converted to an amphibious transport submarine…