United States D-class submarine

USS D-1
Class overview
Name	D class
Builders	Electric Boat (design), Fore River Shipbuilding, Quincy, Massachusetts
Operators	United States Navy
Preceded by	C class
Succeeded by	E class
Built	April 1909–September 1910
In commission	November 1909–March 1922
Completed	3
Retired	3
General characteristics
Type	Submarine
Displacement	288 long tons (293 t) surfaced 337 long tons (342 t) submerged
Length	134 ft 10 in (41.10 m)
Beam	13 ft 11 in (4.24 m)
Draft	12 ft 6 in (3.81 m)
Installed power	600 bhp (450 kW) (gasoline) 330 hp (250 kW) (electric)
Propulsion	2 × gasoline engines 2 × electric motors
Speed	13 kn (24 km/h; 15 mph) surfaced 9.5 kn (17.6 km/h; 10.9 mph) submerged
Range	1,179 nmi (2,184 km; 1,357 mi) at 9.3 knots (17.2 km/h; 10.7 mph) on the surface 24 nmi (44 km; 28 mi) at 8 knots (15 km/h; 9.2 mph) submerged
Test depth	200 feet (61.0 m)
Complement	15 officers and enlisted
Armament	4 × 18 inch (450 mm) bow torpedo tubes

The United States D-class submarines were a trio of submarines built for the United States Navy in the first decade of the 20th century. All three ships served during World War I providing training for crews and officers on the U.S. East Coast, before the class was decommissioned and sold for scrap in 1922.