USS Unicorn (SS-436)

USS Unicorn (SS-436), a World War II Tench-class submarine, was the second submarine of the United States Navy to be given that name for the narwhal, an Arctic marine cetacean with a single tusk suggesting the horn of a unicorn and sometimes called the "sea unicorn." Like the first USS Unicorn (SS-429), she was not completed.

For other ships with the same name, see USS Unicorn.
History
United States
Name: USS Unicorn
Namesake: The narwhal, sometimes called the "sea unicorn"
Builder: Electric Boat Company, Groton, Connecticut
Laid down: 25 April 1945
Launched: 1 August 1946
Sponsored by: Mrs. William A. Rowan
Completed: Never
Commissioned: Never
Stricken: 29 July 1958
Fate: Construction contract cancelled 7 January 1946; reinstated 25 February 1946 to allow launch; sold for scrapping 1958
General characteristics
Class and type: Tench-class diesel-electric submarine [1]
Displacement:
  • 1,570 tons (1,595 t) surfaced [1]
  • 2,416 tons (2,455 t) submerged [1]
Length: 311 ft 8 in (95.00 m) [1]
Beam: 27 ft 4 in (8.33 m) [1]
Draft: 17 ft 0 in (5.18 m) maximum [1]
Propulsion:
Speed:
  • 20.25 knots (38 km/h) surfaced [5]
  • 8.75 knots (16 km/h) submerged [5]
Range: 11,000 nautical miles (20,000 km) surfaced at 10 knots (19 km/h) [5]
Endurance:
  • 48 hours at 2 knots (3.7 km/h) submerged [5]
  • 75 days on patrol
Test depth: 400 ft (120 m) [5]
Complement: 10 officers, 71 enlisted [5]
Armament:

Unicorn's keel was laid down on 25 April 1945 by the Electric Boat Company of Groton, Connecticut. The contract to build her was cancelled on 7 January 1946; however, it was reinstated on 26 February 1946 for "completion of specific items,"[6] and she was launched on 1 August 1946 sponsored by Mrs. William A. Rowan, and accepted by the Navy on 3 September 1946.

Towed to the Portsmouth Naval Shipyard at Kittery, Maine, on 15 September 1946, Unicorn was moved to New London, Connecticut, two months later and assigned to the Atlantic Reserve Fleet. She remained out of commission, in reserve, until 29 July 1958, when she was stricken from the Naval Vessel Register and sold for scrap.

References
  1. Bauer, 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.
  2. Bauer, 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.
  3. U.S. Submarines Through 1945 pp. 261–263
  4. U.S. Submarines Through 1945 pp. 305–311
  5. U.S. Submarines Through 1945 pp. 305-311
  6. This quote, from the Dictionary of American Naval Fighting Ships (at ) is unattributed.

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