USS Grampus (SS-207)

History
Builder:	Electric Boat Company, Groton, Connecticut
Laid down:	14 February 1940
Launched:	23 December 1940
Commissioned:	23 May 1941
Struck:	21 June 1943
Fate:	Possibly sunk by Japanese destroyers in Blackett Strait, 5 March 1943
General characteristics
Class and type:	Tambor class diesel-electric submarine
Displacement:	1,475 long tons (1,499 t) standard, surfaced 2,370 tons (2,408 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 × General Motors Model 16-248 V16 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 Grampus (SS-207), a Tambor-class submarine, was the sixth ship of the United States Navy to be named for a member of the dolphin family (Delphinidae): Grampus griseus, also known as Risso's dolphin.

Her keel was laid down by the Electric Boat Company of Groton, Connecticut. She was launched on 23 December 1940 (sponsored by Mrs. Clark H. Woodward) and commissioned on 23 May 1941 at New London, Connecticut, with Lieutenant Commander Edward S. Hutchinson in command. Grampus received three battle stars for World War II service. Her first, fourth, and fifth war patrols were designated successful.

After shakedown in Long Island Sound, Grampus sailed to the Caribbean Sea with Grayback (SS-208) on 8 September to conduct a modified war patrol, returning to New London, Connecticut, on 28 September. The Japanese attack on Pearl Harbor found Grampus undergoing post-shakedown overhaul at Portsmouth, New Hampshire, but soon ready for war on 22 December, she sailed for the Pacific, reaching Pearl Harbor on 1 February 1942, via the Panama Canal and Mare Island.

On her first war patrol from 8 February to 4 April 1942, Grampus sank an 8636-ton tanker, the only kill of her short career, and reconnoitered Kwajalein and Wotje atolls, later the scene of bloody but successful landings. Grampus' second patrol en route to Fremantle, Australia, and her third patrol from that base were marred by a heavy number of antisubmarine patrol craft off Truk Lagoon and poor visibility as heavy rains haunted her path along the Luzon and Mindoro coasts.

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Wikipedia