USS Tuna (SS-203)

	USS Tuna underway in San Francisco Bay on 10 March 1941.
History
United States
Name	Tuna
Namesake	Tuna
Builder	Mare Island Naval Shipyard
Laid down	19 July 1939
Launched	2 October 1940
Commissioned	2 January 1941
Decommissioned	11 December 1946
Stricken	21 October 1948
Fate	Used as target for Operation Crossroads atomic bomb tests, then scuttled off southern California 24 September 1948
General characteristics
Class & type	Tambor-class diesel-electric submarine
Displacement	1,475 long tons (1,499 t) standard, surfaced; 2,370 long tons (2,410 t) submerged;
Length	307 ft 2 in (93.62 m)
Beam	27 ft 3 in (8.31 m)
Draft	14 ft 7+1⁄2 in (4.458 m)
Propulsion	4 × Fairbanks-Morse Model 38D8-⅛ 9-cylinder opposed piston diesel engines driving electrical generators; 2 × 126-cell Sargo batteries; 4 × high-speed General Electric electric motors with reduction gears; two propellers; 5,400 shp (4.0 MW) surfaced; 2,740 shp (2.0 MW) submerged;
Speed	20.4 knots (38 km/h) surfaced; 8.75 knots (16 km/h) submerged;
Range	11,000 nautical miles (20,000 km) at 10 knots (19 km/h)
Endurance	48 hours at 2 knots (3.7 km/h) submerged
Test depth	250 ft (76 m)
Complement	6 officers, 54 enlisted
Armament	10 × 21-inch (533 mm) torpedo tubes; 6 forward, 4 aft; 24 torpedoes; 1 × 3-inch (76 mm) / 50 caliber deck gun; Bofors 40 mm and Oerlikon 20 mm cannon;

USS Tuna (SS-203) was a United States Navy Tambor-class submarine, serving in the Pacific during World War II and earning seven battle stars for her service. After the war, she participated in the Bikini Atoll atomic testing in 1946.

Tuna was the second ship of the U.S. Navy to be named for the tuna, a vigorous, spiny-finned fish highly esteemed for sport and food.