SM U-13 in the Harbour of Kiel (first boat left)
|Ordered:||23 February 1908|
|Builder:||Kaiserliche Werft Danzig|
|Launched:||16 December 1911|
|Commissioned:||25 April 1912|
|Fate:||9 August 1914 – rammed and sunk at Coordinates: , 29 dead|
|Class and type:||German Type U 13 submarine|
|Length:||57.88 m (189 ft 11 in)|
|Beam:||6 m (19 ft 8 in)|
|Draught:||3.44 m (11 ft 3 in)|
|Test depth:||50 m (160 ft)|
|Boats & landing |
|Complement:||4 officers, 25 men|
|Armament:||4 × 45 cm (17.7 in) torpedo tubes (2 each bow and stern) with 6 torpedoes|
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.
- "SM" stands for "Seiner Majestät" (English: His Majesty's) and combined with the U for Unterseeboot would be translated as His Majesty's Submarine.
- Helgason, Guðmundur. "WWI U-boat commanders: Han Artur Graf von Schweinitz und Krain". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 14 March 2015.
- Gröner, Erich; Jung, Dieter; Maass, Martin (1991). U-boats and Mine Warfare Vessels. German Warships 1815–1945. 2. Translated by Thomas, Keith; Magowan, Rachel. London: Conway Maritime Press. ISBN 0-85177-593-4.
- Kemp, Paul (1997). U-boats destroyed, German submarine losses in the World Wars. London: Arms & Armour Press. p. 9. ISBN 1-85409-321-5.
- Helgason, Guðmundur. "WWI U-boats: U 13". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 14 March 2015.