|Shipyard||Blohm & Voss, Hamburg (Werk 250)|
|Ordered||30 Apr 1915|
|Launched||26 Sep 1915|
|Commissioned||8 Feb 1916|
|Successes||13 ships sunk with a total of 10,230 tons.|
1 ship damaged with a total of 7,241 tons.
1 ship taken as prize with a total of 1,047 tons. (View ships hit by UB 20)
|Fate||28 Jul 1917 - Hit a mine and sank with all hands while on a diving trial off Zeebrugge at 51°21’N, 02°38’E. 13 dead (all hands lost).|
The wreck has been located and identified by local divers.