USS Tigrone

	USS Tigrone (SSR-419) in configuration as a Radar Picket
History
United States
Builder	Portsmouth Naval Shipyard, Kittery, Maine
Laid down	8 May 1944
Launched	20 July 1944
Commissioned	25 October 1944
Decommissioned	January 1947
Recommissioned	July 1948
Decommissioned	October 1957
Recommissioned	10 March 1962
Decommissioned	27 June 1975
Stricken	27 June 1975
Nickname(s)	Tiger-One
Fate	Sunk as a target off Cape Hatteras, 25 October 1976
General characteristics
Class and type	Tench-class diesel-electric submarine
Displacement	1,570 tons (1,595 t) surfaced ; 2,416 tons (2,456 t) submerged ;
Length	311 ft 8 in (95.00 m)
Beam	27 ft 4 in (8.33 m)
Draft	17 ft (5.2 m) maximum
Propulsion	4 × Fairbanks-Morse Model 38D8-⅛ 10-cylinder opposed piston diesel engines driving electrical generators; 2 × 126-cell Sargo batteries; 2 × low-speed direct-drive General Electric electric motors; two propellers ; 5,400 shp (4.0 MW) surfaced; 2,740 shp (2.0 MW) submerged;
Speed	20.25 knots (38 km/h) surfaced ; 8.75 knots (16 km/h) submerged ;
Range	11,000 nautical miles (20,000 km) surfaced at 10 knots (19 km/h)
Endurance	48 hours at 2 knots (3.7 km/h) submerged ; 75 days on patrol;
Test depth	400 ft (120 m)
Complement	10 officers, 71 enlisted
Armament	10 × 21-inch (533 mm) torpedo tubes; 6 forward, 4 aft); 28 torpedoes; 1 × 5-inch (127 mm) / 25 caliber deck gun; Bofors 40 mm and Oerlikon 20 mm cannon;

USS Tigrone (SS/SSR/AGSS-419), a Tench-class submarine, was the only ship of the United States Navy to be named for the tigrone, a tiger shark found in tropical waters. Her keel was laid down on 8 May 1944 by the Portsmouth Navy Yard. She was launched on 20 July 1944 sponsored by Mrs. Mary B. Grisham (née Breault), wife of Captain Charles F. Grisham, USN, Superintendent of the Portsmouth, N.H., Navy Yard, and commissioned on 25 October 1944.

Tigrone completed fitting out in mid-November and conducted training out of Portsmouth, New Hampshire, and New London, Connecticut, before departing the Submarine Base at New London on the last day of 1944. After ten days of training at the Fleet Sound School, the new submarine got underway on 16 January. Steaming via the Canal Zone, she paused for a week of training off Panama, then set her course for Hawaii, conducting extensive practice approach exercises with attack transport Riverside en route. On 16 February, she arrived at Pearl Harbor to prepare for her first war patrol.

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