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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 20 July 1942, launched on 28 February 1943, commissioned on 27 July 1943, decommissioned on 12 February 1947, converted into a radar picket submarine at Philadelphia Navy Yard since December 1950, redesignated SSR-271 on 3 January 1951, recommissioned on 13 August 1952, decommissioned on 30 September 1958, stricken on 1 April 1960 and sold to be broken up on 18 December 1960.
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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