SM U-15 (Germany)

	U 15 underway
History
Germany
Name	U-15
Ordered	23 February 1909
Builder	Kaiserliche Werft Danzig
Cost	2,101,000 Goldmark
Yard number	10
Launched	18 September 1911
Commissioned	7 July 1912
Fate	Rammed and sunk 9 August 1914
General characteristics
Class & type	Type U 13 submarine
Displacement	516 t (508 long tons) surfaced; 644 t (634 long tons) submerged;
Length	57.88 m (189 ft 11 in)
Beam	6 m (19 ft 8 in)
Draught	3.44 m (11 ft 3 in)
Propulsion	2 shafts; 2 × Körting 6-cylinder and 2 × Körting 8-cylinder two stroke paraffin motors with 900 PS (660 kW; 890 shp); 2 × SSW electric motors with 1,040 PS (760 kW; 1,030 shp); 550 rpm surfaced; 600 rpm submerged;
Speed	14.8 knots (27.4 km/h; 17.0 mph) surfaced; 10.7 knots (19.8 km/h; 12.3 mph) submerged;
Range	2,000 nautical miles (3,700 km; 2,300 mi) at 14 kn
Test depth	50 m (160 ft)
Boats & landing; craft carried	1 dinghy
Complement	4 officers, 25 men
Armament	4 × 45 cm (17.7 in) torpedo tubes (2 each bow and stern) with 6 torpedoes
Service record
Part of	II Flotilla; 1–9 August 1914;
Commanders	Kptlt. Richard Pohle; 1–9 August 1914;
Operations	1 patrol
Victories	None

SM U-15 was one of the three Type U 13 gasoline-powered U-boats produced by the German Empire for the Imperial German Navy. On 9 August 1914, U-15 became the first U-boat lost to an enemy warship after it was rammed by British light cruiser HMS Birmingham in the North Sea.