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USS ''Chopper'' (SS/AGSS/IXSS-342), a submarine, was the only ship of the United States Navy to be named for the chopper, a bluefish common in the rivers of the Mississippi Valley. Her keel was laid down by the Electric Boat Company in Groton, Connecticut. She was launched on 4 February 1945 sponsored by Mrs. G. S. Beebe, and commissioned on 25 May 1945 with Lieutenant Commander S. Filipone in command. ''Chopper '' sailed from New London, Connecticut on 4 July 1945 for Pearl Harbor, where she lay from 21 September-24 October. On 30 October, she arrived at San Diego, California, her assigned home port. She sailed on 2 January 1946 for the Philippines, where she trained and offered local services until 11 May, when she returned to San Diego and began local operations. Her next deployment — a simulated war patrol to China — took place from 28 July-9 November 1947. After west coast operations through 1948, she departed San Diego on 14 March 1949 for her new home port, Key West, Florida, arriving on 4 April. Operations in Florida waters and the Caribbean Sea were conducted until 15 September 1950, when she entered the Electric Boat Company yards for modernization. She returned to Key West for fleet exercises and training 23 May 1951. ''Chopper'' departed Key West, Florida on 7 January 1952 for a tour of duty in the Mediterranean Sea until 20 May. She resumed local operations, then joined in North Atlantic Treaty Organization (NATO) operations in the Atlantic from 12 September-14 October. Frequent trips to Guantanamo Bay, Cuba, and local operations continued until 25 May 1959, when she sailed to join in special exercises in the Mediterranean before returning to Key West on 9 August. Through 1960, she continued operations off Florida and in the Caribbean Sea, often acting as target for surface ships in training. ==Accident== On 11 February 1969, ''Chopper'' was participating in an ASW exercise off the coast of Cuba with when her electrical power tripped off-line. ''Chopper'' was making at a depth of with a slight down angle when she lost power. Within seconds, ''Chopper''s angle increased to 45° down and her bow passed of depth. Because of the power loss, the Officer of the Deck was unable to communicate with the Senior Controllerman in Maneuvering room, but the senior man in the Maneuvering Room independently ordered both main motors back full. Despite the backing bell, blowing ballast, and other efforts to regain control of the submarine, the down angle continued to increase, and within one minute of the power failure, ''Chopper'' was nearly vertical in the water, bow down. ''Chopper''s bow is estimated to have reached a depth of , her stern reaching . The crew’s efforts began to take effect. ''Chopper'' lost the headway that was taking her deeper, and even began to make sternway. Her bow began to rise, reached level, and continued to climb. ''Chopper'' began to ascend with a rapidly increasing up-angle until she was again nearly vertical in the water, now bow up. About two minutes after losing electrical power, ''Chopper'' shot through the surface of the ocean, nearly vertical. The entire forward section of the submarine, to the aft edge of the sail, cleared the surface before she fell back. Her momentum carried her down to a depth of about before she surfaced again, leveled out, and remained on the surface. ''Chopper'' returned to port under her own power. Inspection discovered that her hull had suffered extensive structural damage during the deep dive and rapid ascent. ''Chopper'' was decommissioned on 15 September 1969. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「USS Chopper (SS-342)」の詳細全文を読む スポンサード リンク
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