History
German Empire
Name	U–2
Ordered	4 March 1906[1]
Builder	Kaiserliche Werft Danzig[1]
Cost	1,548,000 Goldmark
Yard number	1
Launched	18 June 1908[1]
Commissioned	18 July 1908[1]
Decommissioned	19 February 1919
Fate	Sold to Stinnes 3 February 1920 for shipbreaking
General characteristics [2]
Class and type	German Type U 2 submarine
Displacement	341 t (336 long tons) surfaced 430 t (420 long tons) submerged
Length	45.42 m (149 ft) (o/a) 39.30 m (128 ft 11 in) (pressure hull)
Beam	5.50 m (18 ft 1 in)
Draught	3.05 m (10 ft)
Installed power	2 × Daimler 6-cylinder four stroke paraffin motors with 600 PS (440 kW; 590 shp) 2 × SSW electric motors with 630 PS (460 kW; 620 shp) 550 rpm surfaced 685 rpm submerged
Propulsion	2 shafts 2 × 1 m (3 ft 3 in) propellers
Speed	13.2 kn (24.4 km/h; 15.2 mph) surfaced 9 knots (17 km/h; 10 mph) submerged
Range	1,600 nautical miles (3,000 km; 1,800 mi) at 13 knots (24 km/h; 15 mph) surfaced 50 nautical miles (93 km; 58 mi) at 5 knots (9.3 km/h; 5.8 mph) submerged
Test depth	30 m (98 ft)
Boats & landing craft carried	1 dingi
Complement	3 officers, 19 men
Armament	4  ×  torpedo tubes (two bow, two stern) 6 45 cm (18 in) torpedoes
Service record
Part of:	Training Flotilla 1 August 1914 - 11 November 1918
Commanders:	Friedrich Lützow
Operations:	none
Victories:	No ships sunk or damaged

SM U-2 was a German U-boat built for the Imperial German Navy. Only one of the type, sometimes called German Type U 2 submarine, was built. U-2 was ordered from Kaiserliche Werft of Danzig on 4 March 1906, launched on 18 June 1908, and commissioned into the Imperial German Navy on 18 July 1908. She conducted no war patrols and spent World War I as a training platform.

After Germany's surrender, she was decommissioned on 19 February 1919 and sold for shipbreaking to Stinnes on 3 February 1920.

• Gröner, Erich; Jung, Dieter; Maass, Martin (1991). U-boats and Mine Warfare Vessels. German Warships 1815–1945. Vol. 2. Translated by Thomas, Keith; Magowan, Rachel. London: Conway Maritime Press. ISBN 0-85177-593-4.
• Rössler, Eberhard (1985). Die deutschen U-Boote und ihre Werften: U-Bootbau bis Ende des 1. Weltkriegs, Konstruktionen für das Ausland und die Jahre 1935–1945 [The German Submarines and Their Shipyards: Submarine Construction Until the End of the First World War] (in German). Vol. I. Koblenz: Bernard & Graefe. ISBN 3-7637-5213-7.
• Robert C. Stern. Battle Beneath the Waves: U-boats at War, Cassell Military Paperbacks, 2002. ISBN 0-304-36228-X

• Helgason, Guðmundur. "WWI U-boats: U 2". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 26 February 2007.