USS Ulua (SS-428)

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USS Ulua (SS-428) and USS Trumpetfish (SS-425) under construction.jpg
USS Ulua (SS-428) (left) and USS Trumpetfish (SS-425) (right) under construction at the Cramp Shipbuilding Company, Philadelphia, on 2 July 1945.
Career (United States)
Name: USS Ulua
Namesake: The ulua, a tropical Pacific food fish
Builder: Cramp Shipbuilding Company, Philadelphia, Pennsylvania
Laid down: 13 November 1943
Launched: 23 April 1946
Completed: Never
Commissioned: Never
Struck: 12 June 1958
Fate: Construction contract cancelled 12 August 1945
Notes: Served as testing hulk 1951-1958
General characteristics
Class and type: Balao class diesel-electric submarine[1]
Displacement: 1,526 long tons (1,550 t) surfaced,[1] 2,414 long tons (2,453 t) submerged[1]
Length: 311 ft 9 in (95.02 m)[1]
Beam: 27 ft 3 in (8.31 m)[1]
Draft: 16 ft 10 in (5.13 m) maximum[1]
Propulsion: 4 × General Motors Model 16-248 V16 diesel engines driving electrical generators[1][2]

2 × 126-cell Sargo batteries [3]
4 × high-speed General Electric electric motors with reduction gears [1]
two propellers [1]
5,400 shp (4.0 MW) surfaced[1]

2,740 shp (2.0 MW) submerged[1]
Speed: 20.25 kn (37.50 km/h) surfaced,[3] 8.75 kn (16.21 km/h) submerged[3]
Range: 11,000 nmi (20,000 km) surfaced @ 10 kn (19 km/h)[3]
Endurance: 48 hours @ 2 kn (3.7 km/h) submerged,[3] 75 days on patrol
Test depth: 400 ft (120 m)[3]
Complement: 10 officers, 70–71 enlisted[3]
Armament: 10 × 21-inch (533 mm) torpedo tubes
 (six forward, four aft)
 24 torpedoes[3]
1 × 4-inch (102 mm) / 50 caliber deck gun[3]
Bofors 40 mm and Oerlikon 20 mm cannon

USS Ulua (SS-428), a Balao-class submarine, was the only ship of the United States Navy named for the ulua, an important food fish of the tropical Pacific Ocean. She was never completed.

Ulua‍ '​s keel was laid down on 13 November 1943 at Philadelphia by the Cramp Shipbuilding Company, but the curtailment of U.S. Navy construction programs in the closing days of World War II resulted in the suspension of further construction on 12 August 1945.

The partly completed submarine was launched on 23 April 1946 and towed to the Portsmouth Naval Shipyard in Kittery, Maine, for maintenance prior to beginning her career as a test hull. Towed to Norfolk, Virginia, in 1951, she participated in tests to gather research data on new weapon and submarine design.

Ulua was stricken from the Naval Vessel Register list on 12 June 1958. Her hulk was sold for scrap on 30 September 1958 to the Portsmouth Salvage Company, Inc..


  1. ^ a b c d e f g h i j k Bauer, K. Jack; Roberts, Stephen S. (1991). Register of Ships of the U.S. Navy, 1775-1990: Major Combatants. Westport, Connecticut: Greenwood Press. pp. 275–280. ISBN 0-313-26202-0. 
  2. ^ U.S. Submarines Through 1945 pp. 261
  3. ^ a b c d e f g h i U.S. Submarines Through 1945 pp. 305-311

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