Narval class submarine (Russia)

Russian submarine Narval under construction
Class overview
Name:	Narval class
Builders:	Nikolayev Dockyard
Operators:	Imperial Russian Navy]]
In commission:	1914–1919
Completed:	3
Lost:	3
General characteristics
Type:	Submarine
Displacement:	621 tons surfaced 994 tons submerged
Length:	70.1 m (230.0 ft)
Beam:	6.5 m (21.3 ft)
Draught:	3.5 m (11.5 ft)
Installed power:	640 hp (480 kW) (diesel) 900 hp (670 kW) (electric)
Propulsion:	2 shafts Diesel-electric propulsion 4 diesel engines (2 per shaft)
Speed:	9.5 kn (17.6 km/h) (surfaced) 11.5 kn (21.3 km/h) (submerged)
Range:	12 days, 3500 miles at 6.5 knots 103 miles under water at 4 knots
Complement:	47
Armament:	2 × bow 450 mm (18-inch) torpedo tubes 2 × stern 450 mm (18-inch) torpedo tubes 8 × external torpedo drop collars 1 × 75 mm gun 1 × 57 mm gun 2 × 7.62 mm machine guns since 1917 2 × bow 450 mm (18-inch) torpedo tubes 2 × stern 450 mm (18-inch) torpedo tubes 4 × external torpedo drop collars 2 × 75 mm gun 1 × 37 mm gun 2 × 7.62 mm machine guns

The Narval class were a group of submarines built for the Imperial Russian Navy. They were designed by the Electric Boat Company and ordered in the 1911 programme as the "Holland 31A" design. The Narval class had advanced features including watertight bulkheads, a crash diving tank and gravitationally filled ballast tanks which did not feature in contemporary Russian-designed boats. The boats were well regarded by the Russian Navy and served in the Black Sea Fleet during World War I, during which they sank 8 merchant ships and 74 coastal vessels.

In end of 1917 the submarines were transferred to the reserve. The submarines scuttled by the British forces in April 1919 near Sevastopol.

Three submarines were built by Nikolayev Dockyard.

Kit was raised by EPRON in 1934, but the hulls of the other two boats remain on the bottom in the place they were scuttled.