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USS Columbus (SSN-762)
USS ''Columbus'' (SSN-762) is a nuclear powered fast attack submarine and the second vessel of the United States Navy to be named for Columbus, Ohio. The contract to build her was awarded to the Electric Boat Division of General Dynamics Corporation in Groton, Connecticut, on 21 March 1986 and her keel was laid down on 9 January 1991. She was launched on 1 August 1992 sponsored by Mrs. Margaret DeMars, wife of Admiral Bruce DeMars and commissioned on 24 July 1993. Operational history ''Columbus'' completed a Post Shipyard Availability in June 1994 in Groton, Connecticut after initial construction and shakedown operations. In September 1994, the submarine conducted an interfleet transfer to Pearl Harbor, Hawaii and joined the U.S. Pacific Fleet Submarine Force. ''Columbus'' deployed to the Western Pacific in late 1995 through early 1996 and conducted a variety of operations as a unit of the Seventh Fleet along the way making port visits in Hong Kong, Subic Bay, Gu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Emergency Main Ballast Tank Blow
An emergency main ballast tank blow is a procedure used aboard a submarine that forces high-pressure air into its main ballast tanks A ballast tank is a compartment within a boat, ship or other floating structure that holds water, which is used as ballast to provide hydrostatic stability for a vessel, to reduce or control buoyancy, as in a submarine, to correct trim or list .... The high-pressure air forces ballast water from the tanks, quickly lightening the ship so it can rapidly rise to the surface. The partial failure of the emergency main ballast tank blow system, caused by icing of strainers in the air lines due to "the high volume of air moving past the strainers at such high velocity hichwould have caused them to cool rapidly" contributed to the loss of in 1963. That accident resulted in substantial redesign of submarine emergency blow systems by the United States Navy: "Part of this initiative was to end the practice of brazing smaller pipes, and to instead start ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
