Bars-class submarine (1915)

Bars in 1914
Class overview
Name	Bars class
Operators	Imperial Russian Navy  Imperial German Navy (captured)  Soviet Navy
Preceded by	Morzh class
Succeeded by	Dekabrist class
In commission	1914–1941
Completed	24
Lost	9
General characteristics [1]
Type	Submarine
Displacement	650 tons surfaced 780 tons submerged
Length	223 ft (68 m)
Beam	15 ft (4.6 m)
Draft	13 ft (4.0 m)
Propulsion	Diesel-electric 2,640 hp diesel 900 hp electric (as designed) 2 shafts
Speed	18 knots (33 km/h) surfaced 9 knots (17 km/h) submerged
Range	400 nmi (740 km)
Complement	33
Armament	1 × 63 mm (2.5 in) (as designed) 1 × 37 mm (1.5 in) AA gun 4 × 457 mm (18.0 in) torpedo tubes 8 × torpedoes in drop collars (later removed)

The Bars class were a group of submarines built for the Imperial Russian Navy during World War I. A total of 24 boats were built between 1914 and 1917. A number of them saw action during the First World War, and three were lost in the conflict. The surviving boats were taken over by the Soviets after the Bolshevik Revolution and a number of them remained in service until the 1930s.