SM U-13

SM U-13^{[Note 1]} was one of the 329 submarines serving in the Imperial German Navy in World War I. U-13 was engaged in the naval warfare and took part in the First Battle of the Atlantic.

SM U-13 in the Harbour of Kiel (first boat left)
History
Germany
Name	U-13
Ordered	23 February 1908
Builder	Kaiserliche Werft Danzig
Cost	2,101,070 Goldmark
Yard number	8
Laid down	1908
Launched	16 December 1911
Commissioned	25 April 1912
Fate	Sunk in the North Sea at an unknown time and location between August 6 and August 12, 1914 through accidental cause
General characteristics
Class and type	German 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
Test depth	50 m (160 ft)
Boats & landing craft carried	1 dingi
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:	I Flotilla 1 August 1914 – 10 March 1915
Commanders:	Kptlt. Han Artur Graf von Schweinitz und Krain[1] 1–12 August 1914
Operations:	1 patrol
Victories:	None

She had left Heligoland on 6 August 1914 and was not heard from again. She may have been a victim of the German defensive minefield in Heligoland Bight, or from an accident or mechanical failure.