USS H-6

	H-6 underway, c. 1918, off San Pedro, California, with Submarine Division 6 emblem on conning tower
History
United States
Name	H-6
Ordered	by the Imperial Russian Navy, 1915
Builder	British Pacific Construction and Engineering Company, Vancouver, Canada; Puget Sound Navy Yard, Bremerton, Washington;
Cost	$564,423.12 (hull and machinery)
Laid down	14 May 1918
Launched	26 August 1918
Sponsored by	Miss Catherine Ely
Commissioned	9 September 1918
Decommissioned	23 October 1922
Stricken	26 February 1931
Identification	Hull symbol: SS-149 (17 July 1920); Call sign: NEFC; ;
Fate	Sold for scrapping, 28 November 1931
General characteristics
Type	H-class submarine
Displacement	358 long tons (364 t) surfaced; 467 long tons (474 t) submerged;
Length	150 ft 4 in (45.82 m)
Beam	15 ft 10 in (4.83 m)
Draft	12 ft 5 in (3.78 m)
Installed power	950 hp (710 kW) (diesel engines); 600 hp (450 kW) (electric motors);
Propulsion	2 × NELSECO diesel engines; 2 × Electro Dynamic electric motors; 2 × 60-cell batteries; 2 × Propellers;
Speed	14 kn (26 km/h; 16 mph) surfaced; 10.5 kn (19.4 km/h; 12.1 mph) submerged;
Range	2,300 nmi (4,300 km; 2,600 mi) at 11 kn (20 km/h; 13 mph) surfaced; 100 nmi (190 km; 120 mi) at 5 kn (9.3 km/h; 5.8 mph) submerged;
Test depth	200 ft (61 m)
Capacity	11,800 US gal (45,000 L; 9,800 imp gal) fuel
Complement	2 officers; 23 enlisted;
Armament	4 × 18 inch (450 mm) bow torpedo tubes (8 torpedoes)

USS H-6 (SS-149) was an H-class submarine of the United States Navy (USN) 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 USN, on 20 May 1918.