|Ordered||20 Jan 1941|
|Laid down||6 Apr 1942||AG Weser, Bremen (werk 1048)|
|Launched||14 Nov 1942|
|Commissioned||1 Mar 1943||Kptlt. Wolfgang Heller|
|Successes||No ships sunk or damaged|
Sunk at 1400hrs on 6 November 1943 in the North Atlantic south-east of Newfoundland, in position 43.42N, 42.08W, by depth charges from the British sloops HMS Starling and HMS Wild Goose. 56 dead (all hands lost).
U-842 operated with the following Wolfpacks during its career:
Schlieffen (14 Oct 1943 - 22 Oct 1943)
Siegfried (22 Oct 1943 - 27 Oct 1943)
Siegfried 3 (27 Oct 1943 - 30 Oct 1943)
Jahn (30 Oct 1943 - 2 Nov 1943)
Tirpitz 5 (2 Nov 1943 - 6 Nov 1943)
Men lost from U-boats
Unlike many other U-boats, which during their service lost men due to accidents and various other causes, U-842 did not suffer any casualties (we know of) until the time of her loss.