USS H-7

USS H-7 (SS-150) was a H-class submarine originally built for the Imperial Russian Navy. Six of these were not delivered pending the outcome of the Russian Revolution of 1917 before being purchased by the United States Navy on 20 May 1918.

USS H-7 underway, circa 1922
History
United States
NameH-7
Orderedby the Imperial Russian Navy, 1915
BuilderPuget Sound Navy Yard, Bremerton, Washington
Laid down15 May 1918
Launched17 October 1918
Acquired20 May 1918
Commissioned24 October 1918
Decommissioned23 October 1922
ReclassifiedSS-150, 17 July 1920
Stricken26 February 1931
FateSold for scrapping, 28 November 1933
General characteristics
Class and typeH-class submarine
Displacement
  • 358 long tons (364 t) surfaced
  • 467 long tons (474 t) submerged
Length150 ft 4 in (45.82 m)
Beam15 ft 10 in (4.83 m)
Draft12 ft 5 in (3.78 m)
Installed power
Propulsion
Speed
  • 14 kn (26 km/h; 16 mph) surfaced
  • 10.5 knots (19.4 km/h; 12.1 mph) submerged
Range
  • 2,300 nmi (4,300 km; 2,600 mi) at 11 knots (20 km/h; 13 mph) on the surface
  • 100 nmi (190 km; 120 mi) at 5 knots (9.3 km/h; 5.8 mph) submerged
Test depth200 ft (61 m)
Complement25
Armament4 × 18-inch (450 mm) torpedo tubes

Description

The H-class submarines had a length of 150 feet 4 inches (45.8 m) overall, a beam of 15 feet 10 inches (4.8 m) and a mean draft of 12 feet 5 inches (3.8 m). They displaced 358 long tons (364 t) on the surface and 467 long tons (474 t) submerged. The boats had a crew of 2 officers and 23 enlisted men. They had a diving depth of 200 feet (61.0 m).[1]

For surface running, they were powered by two New London Ship & Engine Co. 475-brake-horsepower (354 kW) diesel engines, each driving one propeller shaft. When submerged each propeller was driven by a 170-horsepower (127 kW) Electro Dynamic Co. electric motor. They could reach 14 knots (26 km/h; 16 mph) on the surface and 10.5 knots (19.4 km/h; 12.1 mph) underwater.[1] On the surface, the boats had a range of 2,300 nautical miles (4,300 km; 2,600 mi) at 11 knots (20 km/h; 13 mph) and 100 nmi (190 km; 120 mi) at 5 knots (9.3 km/h; 5.8 mph) submerged.[2]

The boats were armed with four 18-inch (450 mm) torpedo tubes in the bow. They carried four reloads, for a total of eight torpedoes.[2]

Construction and career

H-7 was launched on 17 October 1918 and commissioned on 24 October. The submarine, attached to Submarine Division 6 (SubDiv 6) and later to SubDiv 7, operated out of San Pedro, California, on various battle and training exercises with the other ships of her division. She also patrolled out of San Pedro with interruptions for overhaul at Mare Island. H-7 reached Norfolk on 14 September 1922, having sailed from San Pedro on 25 July, and decommissioned there on 23 October. Her name was struck from the Naval Vessel Register on 26 February 1931. She was sold for scrapping on 28 November 1933.

Notes
  1. Friedman, p. 307
  2. Gardiner & Gray, p. 128

References
  • Friedman, Norman (1995). U.S. Submarines Through 1945: An Illustrated Design History. Annapolis, Maryland: Naval Institute Press. ISBN 1-55750-263-3.
  • Gardiner, Robert & Gray, Randal, eds. (1985). Conway's All the World's Fighting Ships 1906–1921. Annapolis, Maryland: Naval Institute Press. ISBN 0-85177-245-5.
  • This article incorporates text from the public domain Dictionary of American Naval Fighting Ships. The entry can be found here.
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