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.[1]
Serving with II Flotilla the U-boat carried out seven war patrols and sank four ships for a total of, and damaged another of tons (HMS Virginian).[1]
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.[1]
| Date | Name | Nationality | Tonnage[2] | Fate[3] | |
|---|---|---|---|---|---|
| 21 August 1917 | HMS Virginian | 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 |