2 × low-speed direct-drive Elliott electric motors[4]
two propellers [4]
5,400 shp (4.0 MW) surfaced[4]
2,740 shp (2.0 MW) submerged[4]
Speed
20.25 knots (38 km/h) surfaced [3]
8.75 knots (16 km/h) submerged [3]
Range
11,000 nautical miles (20,000 km) surfaced at 10 knots (19 km/h) [3]
Endurance
48 hours at 2 knots (3.7 km/h) submerged [3]
75 days on patrol
Test depth
400 ft (120 m) [3]
Complement
10 officers, 71 enlisted [3]
Armament
10 × 21-inch (533 mm) torpedo tubes
6 forward, 4 aft)
28 torpedoes[6]
1 × 5-inch (127 mm) / 25 caliber deck gun[6]
Bofors 40 mm and Oerlikon 20 mm cannon
General characteristics (Guppy IIA)
Displacement
1,848 tons (1,878 t) surfaced[7]
2,440 tons (2,479 t) submerged[7]
Length
307 ft (93.6 m)[8]
Beam
27 ft 4 in (8.3 m)[8]
Draft
17 ft (5.2 m)[8]
Propulsion
Snorkel added[7]
One diesel engine and generator removed [7]
Batteries upgraded to Sargo II [7]
Speed
Surfaced:
17.0 knots (31.5 km/h) maximum
13.5 knots (25.0 km/h) cruising
Submerged:
14.1 knots (26.1 km/h) for ½ hour
8.0 knots (14.8 km/h) snorkeling
3.0 knots (5.6 km/h) cruising [7]
Armament
10 × 21 inch (533 mm) torpedo tubes
(six forward, four aft)[8]
all guns removed[7]
USS Trutta (SS-421), a Tench-class submarine, was the only ship of the United States Navy to be named for the trutta, a variety of trout, distinguished from the typical trout by its small, black spots and its smaller and fewer scales. She was originally assigned the name Tomtate, often misspelled as Tomatate, and would have made her the only ship named for the tomtate, a food fish of warm American waters having a compressed body, a toothless palate, and conical jaw teeth, but was renamed Trutta on 24 September 1942. Her keel was laid down on 22 May 1944 by the Portsmouth Navy Yard. She was launched on 18 August 1944 sponsored by Mrs. Edward C. Magdeburger, and commissioned on 16 November 1944 with Commander Arthur C. Smith in command.
^ abcdefghijFriedman, Norman (1995). U.S. Submarines Through 1945: An Illustrated Design History. Annapolis, Maryland: United States Naval Institute. pp. 285–304. ISBN 1-55750-263-3.
^ abcdefgBauer, K. Jack; Roberts, Stephen S. (1991). Register of Ships of the U.S. Navy, 1775–1990: Major Combatants. Westport, Connecticut: Greenwood Press. pp. 280–282. ISBN 0-313-26202-0.
^ abcdefU.S. Submarines Through 1945 pp. 305-311
^ abcdeBauer, K. Jack; Roberts, Stephen S. (1991). Register of Ships of the U.S. Navy, 1775–1990: Major Combatants. Westport, Connecticut: Greenwood Press. pp. 275–282. ISBN 978-0-313-26202-9.
^U.S. Submarines Through 1945 pp. 261–263
^ abcU.S. Submarines Through 1945 pp. 305–311
^ abcdefgFriedman, Norman (1994). U.S. Submarines Since 1945: An Illustrated Design History. Annapolis, Maryland: United States Naval Institute. pp. 11–43. ISBN 1-55750-260-9.
USSTrutta (SS-421), a Tench-class submarine, was the only ship of the United States Navy to be named for the trutta, a variety of trout, distinguished...
submarine bombardment took place during the morning of 24 June, when USSTrutta fired some shells at the island of Hirado Shima in the Tsushima Strait...
OR USS Bowfin (SS-287) - USS Bowfin Submarine Museum & Park, Pearl Harbor, HI USS Cavalla (SSK-244) - Galveston Naval Museum, Galveston, TX USS Cobia...
1944 — Tirante - sank 8 ships in 2 World War II Pacific patrols 1944 — Trutta - 2 World War II Pacific patrols 1944 — Toro - 2 World War II Pacific patrols...
2020. Lange, Katie (November 14, 2019). "The Legacy the Recently Discovered USS Grayback Left Behind". U.S. Department of Defense. "3D Archaeological Models...