Holland 602 type submarine

USS H-3 served as the prototype for the class
Class overview
Builders	Vickers Canada
Operators	United States Navy  Chilean Navy  Royal Navy  Imperial Russian Navy Ukrainian State Navy  Soviet Navy  Regia Marina  Royal Canadian Navy  Royal Netherlands Navy
In service	1915
In commission	- 1950
General characteristics
Type	Submarine
Displacement	390 tons surfaced 520 tons submerged
Length	46 m (150.9 ft)
Beam	4.9 m (16.1 ft)
Draught	3.8 m (12.5 ft)
Installed power	2 × 240 hp (179 kW) diesel engines 2 × 310 hp (231 kW) electric motors
Propulsion	2 × propeller shafts
Speed	14.5 knots (26.9 km/h) surfaced 10.5 knots (19.4 km/h) submerged
Complement	32
Sensors and processing systems	Fessenden transducer
Armament	4 × bow torpedo tubes 8 torpedoes 1 × 45 mm semi-automatic gun (200 rounds) or 1 × 47 mm gun 1 × machine gun

The Holland 602 type submarine, also known as the H-class submarine, was one of the most numerous submarines of World War I. The type was designed by the Electric Boat Co. of the United States, but most of the boats were built abroad: in Canada by the subsidiary of the British Vickers company and in British shipyards.

Operators included the United States Navy, the Chilean Navy, the Royal Navy (33 submarines), the Imperial Russian Navy, the Soviet Navy, the Italian Regia Marina, the Royal Canadian Navy, the Royal Dutch Navy and the navy of the short-lived Ukrainian State.