USS H-1

	USS H-1, ex-Seawolf, off the Mare Island Navy Yard, California, 30 January 1914
History
United States
Name	Seawolf
Namesake	The seawolf
Builder	Union Iron Works, San Francisco, California
Cost	$510,428.77 (hull and machinery)
Laid down	22 March 1911
Launched	6 May 1913
Sponsored by	Miss Leslie Makins
Commissioned	1 December 1913
Renamed	H-1 (Submarine No.28), 17 November 1911
Stricken	12 April 1920
Identification	Hull symbol: SS-28 (17 July 1920); Call sign: NYC; ;
Fate	Grounded on a shoal, 12 March 1920
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 Seawolf/H-1 (SS-28), also known as "Submarine No. 28", was the lead ship of her class of submarine of the United States Navy (USN). She was the first ship of the USN to be named for the seawolf, though she was renamed H-1 prior to launching.