15,226-ton Japanese tanker Nichinan Maru No. 2 west of the Philippines 8 November. Completing her fourth war patrol 7 January 1945, she proceeded to Mare Island Naval Shipyard, San Francisco Bay, California, where she received special mine detection gear. Underway from Pearl Harbor 30 May to 10 July, and later from 30 July to 5 September she made mine surveys first off Honshū and Hokkaidō, and later off Kyūshū, Japan. Radar picket submarine, 1953–1959 Decommissioned at New London, Conn., 1 November 1946, she entered the Philadelphia Naval Shipyard in April 1951 for conversion, and was reclassified SSR-272. Recommissioned 9 January 1953, she engaged in radar picket duty for the next 6 years in American coastal waters, off northern Europe, and in the Mediterranean. Auxiliary research submarine, 1959–1967 In April 1959 she entered the Philadelphia Naval Shipyard, and received an inertial guidance system. Redfin became a laboratory and training ship for the testing of inertial guidance systems used in Polaris submarines. She preceded the first ballistic missile submarine as flagship of Submarine Squadron 14. After searching for the lost submarine in April 1963, she was reclassified as an auxiliary submarine, AGSS-272, on 28 June 1963. Operating in the Atlantic, she continued to assist in special research and development projects, including of the Polaris A-3 submarine-launched ballistic missile. Decommissioning and disposal Redfin decommissioned on 15 May 1967 to become a United States Naval Reserve Training Ship at Baltimore, Maryland. She was struck from the Navy List on 1 July 1970 and sold to the North American Smelting Company of Wilmington, Delaware, on 3 March 1971 for scrapping. Awards Asiatic–Pacific Campaign Medal with six battle stars World War II Victory Medal Navy Occupation Medal National Defense Service Medal with one service star References External links Official USS Redfin Website Gato-class submarines World War II submarines of the United States Cold War submarines of the United States Ships built in Manitowoc, Wisconsin 1943 ships