USS Tench

	Tench after her GUPPY conversion.
History
United States
Name	Tench
Namesake	Tench
Builder	Portsmouth Naval Shipyard, Kittery, Maine
Laid down	1 April 1944
Launched	7 July 1944
Commissioned	6 October 1944
Decommissioned	January 1947
Recommissioned	October 1950
Decommissioned	8 May 1970
Stricken	15 August 1973
Fate	Sold to Peru for spare parts, 16 September 1976
General characteristics (As completed)
Class & type	Tench-class diesel-electric submarine
Displacement	1,570 long tons (1,600 t) surfaced ; 2,416 tons (2,455 t) submerged ;
Length	311 ft 8 in (95.00 m)
Beam	27 ft 4 in (8.33 m)
Draft	17 ft 0 in (5.18 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 kn (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 (six forward, four aft; 24 torpedoes); one 5 in (130 mm)/25 caliber deck gun; one 40 mm (1.57 in) Bofors antiaircraft cannon; two .50 cal (12.7 mm) machineguns;
General characteristics (Guppy IA)
Displacement	1,830 tons (1,859 t) surfaced; 2,440 tons (2,479 t) submerged;
Length	307 ft 7 in (93.75 m)
Beam	27 ft 4 in (8.33 m)
Draft	17 ft (5.2 m)
Propulsion	Snorkel added; Batteries upgraded to Sargo II ;
Speed	Surfaced:; 17.3 knots (32.0 km/h) maximum; 12.5 knots (23.2 km/h) cruising; Submerged:; 15.0 knots (27.8 km/h) for ½ hour; 7.5 knots (13.9 km/h) snorkeling; 3.0 knots (5.6 km/h) cruising ;
Range	17,000 nmi (31,000 km) surfaced at 11 kn (20 km/h)
Endurance	36 hours at 3 knots (6 km/h) submerged
Complement	10 officers; 5 petty officers; 64–69 enlisted men;
Armament	10 × 21 in (53 cm) torpedo tubes; (six forward, four aft); all guns removed;

USS Tench (hull number SS/AGSS-417), the lead ship of her class of submarine, was the only ship of the United States Navy to be named for the tench. Her keel was laid down on 1 April 1944 at the Portsmouth Navy Yard. She was launched on 7 July 1944, sponsored by Claudia Alta Johnson, the wife of Rep. Lyndon Baines Johnson, and commissioned on 6 October 1944 with Commander William B. "Barney" Sieglaff in command.