American Radar Picket SSR Submarine Migraine III conversion Redfin SSR-272 (1943) 1951-1963 and AGSS-272 1963-1971

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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 3 September 1943, launched on 4 April 1943, commissioned on 31 August 1943, decommissioned on 1 November 1946, conversion by Philadelphia Navy Yard started in April 1951, recommissioned on 9 January 1953, de commissioned on 15 May 1967, stricken on 1 July 1970 and sold to be broken up on 31 March 1971.

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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