|Ordered||15 September 1915|
|Builder||AG Weser, Bremen|
|Laid down||12 August 1916|
|Launched||12 May 1917|
|Commissioned||18 June 1917|
|Fate||Sunk by mine, 30 September 1918|
|General characteristics |
|Class and type||German Type U 57 submarine|
|Height||8.25 m (27 ft 1 in)|
|Draught||3.65 m (12 ft)|
|Propulsion||2 shafts, 2 × 1.65 m (5 ft 5 in) propellers|
|Test depth||50 m (164 ft 1 in)|
|Complement||4 officers, 32 enlisted|
SM U-102 or SM Unterseeboot 102 was a German Type U 57 submarine used by the Imperial German Navy in World War I. U-102 was launched on 12 May 1917. She was commissioned to the Imperial Navy on 18 June 1917.
Serving with II Flotilla the U-boat carried out seven war patrols and sank four ships for a total of 9,340 gross register tons (GRT), and damaged another of 10,757 GRT tons (HMS Virginian).
About 28 to 30 September 1918 U-102 struck a mine in the North Sea Mine Barrage, east of the Orkney Islands while on her way to home. All of her 42 crew members' lives were claimed by the U-boat's sinking. The wreck of U-102 was located by a sonar sweep in 2006. Information to confirm the identification was obtained by divers in 2007.
Summary of raiding history
|21 August 1917||HMS Virginian||Royal Navy||10,757||Damaged|
|8 December 1917||Lucien||France||200||Sunk|
|13 December 1917||Noviembre||Spain||3,500||Sunk|
|21 February 1918||Cheviot Range||United Kingdom||3,691||Sunk|
|3 March 1918||Romeo||United Kingdom||1,730||Sunk|
|24 June 1918||Caroline||Denmark||219||Sunk|
- ^ Merchant ship tonnages are in gross register tons. Military vessels are listed by tons displacement.
- ^ Gröner 1991, pp. 12–14.
- ^ a b c Helgason, Guðmundur. "WWI U-boats: U 102". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 25 January 2010.
- ^ Helgason, Guðmundur. "Ships hit by U 102". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 26 January 2015.
- 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.