SS-417 USS Tench

Namesake. The Tench, a fresh- and brackish-water fish of the order Cypriniformes
Builder. Portsmouth Naval Shipyard, Kittery, ME
Laid down. 1 Apr 1944
Launched. 7 Jul 1944
Commissioned. 6 Oct 1944
Decommissioned. Jan 1947
Recommissioned. Oct 1950
Decommissioned. 8 May 1970
Stricken. 15 Aug 1973
Fate. Sold to Peru for spare parts, 16 Sep 1976
Class and type. Tench-class diesel-electric submarine
Displacement:
1,570 tons (1,595 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 (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

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. 17.3 knots (32.0 km/h) maximum, 12.5 knots (23.2 km/h) cruising (Surfaced); 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 (Submerged)
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