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Part of the Gato-class diesel-electric submarines preceded by Mackerel-class succeeded by Balao-class. Original displacement 1,525 (surfaced)-2,424 (submerged) tons and as dimensions 311.8-311.10 x 27.3 x 17 (maximum) feet. After the conversion was the displacement 1,700 (surfaced)-2,308 (standard) tons and the dimensions 341.6 (over all) x 27.4 (maximum) feet. Instead of original armament of 10-53.3cm/21” torpedo tubes remained just the six bow torpedo tubes. Design agent Philadelphia Naval Shipyard yard was responsible for the actually convenversion. The boats were cut in half and next step was to add a 24-foot section between the forward compartment and the control room. This section was to accommodate the air-control center and required electronic equipment. The stern torpedo room was converted into berthing space resulting in the loss of torpedo tubes.
Laid down by Manitowoc Shipbuilding Company, Manitowoc, Wisconsin, USA on 23 December 1942, launched on 20 June 1943, commissioned on 26 October 1943, decommissioned on 1 May 1946, converted into a rader picket submarine since early 1951, classified as SSR-274 on 18 July 1952, recommissioned on 12 October 1953, decommissioned and stricken on 13 September 1969 and sold to be broken up on 17 August 1972.
Sources
ONI 31-2A. Submarine sighting Guide, dated June 1958.
John D. Alden. The Fleet Submarine in the U.S. Navy. A design and construction history.
N. Friedman. U.S. Submarines Since 1945: An Illustrated Design History.
Wikepedia.
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