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Career
Ordered:
Laid down:
Launched:	19 October 1933
Commissioned:	1 December 1933
Decommissioned:	17 October 1945
Fate:	sold
Stricken:
General characteristics
Displacement:	1110 tons
Length:	271 feet 10 inches
Beam:	24 feet 9 inches
Draft:	12 feet 10 inches
Speed:	17 knots (31 km/h)
Complement:	43 officers and men
Armament:	one three inch (76 mm) gun, six 21-inch (533 mm) torpedo tubes

USS Cachalot (SC-4/SS-170), the lead ship of her class and one of the "V-boats", was the only ship of the United States Navy to be named for the sperm whale. Her keel was laid down by the Portsmouth Navy Yard. She was launched on 19 October 1933 as V-8 (SC-4) sponsored by Miss K. D. Kempff, and commissioned on 1 December 1933 with Lieutenant Commander M. Comstock in command.

After shakedown, further construction, tests, and overhaul, Cachalot sailed for San Diego, California, where on 17 October 1934 she joined the Submarine Force, U.S. Fleet. Operating until 1937 principally on the West Coast, she engaged in fleet problems, torpedo practice, antisubmarine, tactical, and sound training exercises. She cruised twice to Hawaiian waters and once to the Panama Canal Zone to participate in large-scale fleet exercises.

Cachalot cleared San Diego 16 June 1937, bound for New London, Connecticut, and duty in experimental torpedo firing for the Newport Torpedo Station, and sound training for the New London Submarine School until 26 October 1937 when she began a lengthy overhaul at New York Navy Yard. A year later she sailed for participation in a fleet problem, torpedo practice and sound training in the Caribbean Sea and off the Canal Zone, and on 16 June 1939, reported at Pearl Harbor for duty with the Submarine Force and the Scouting Force.

War came to Cachalot as she lay in Pearl Harbor Navy Yard in overhaul. In the Japanese attack on Pearl Harbor of 7 December 1941, one of her men was wounded, but the submarine suffered no damage. Yard work on her was completed at a furious pace, and on 12 January 1942 she sailed on her first war patrol. After fueling at Midway Island, she conducted a reconnaissance of Wake, Eniwetok, Ponape, Truk, Namonuito, and Hall Island, returning to Pearl Harbor on 18 March with vitally needed intelligence of Japanese bases. Her second war patrol, for which she cleared from Midway on 9 June, was conducted off the Japanese home islands, where she damaged an enemy tanker. Returning to Pearl Harbor 26 July, she cleared on her final war patrol 23 September penetrating the frigid waters of the Bering Sea in support of the Aleutian Islands operations.

Overage for strenuous war patrols, Cachalot still had a key role to play during the remainder of the war, which she spent as training ship for the Submarine School at New London. She served there until 30 June 1945, when she sailed to Philadelphia, Pennsylvania, where she was decommissioned 17 October 1945. She was sold 26 January 1947.

Cachalot received three battle stars for World War II service.

This article includes text from the public domain Dictionary of American Naval Fighting Ships.