|Ordered||20 Jan 1941|
|Laid down||7 Dec 1941||Nordseewerke, Emden (werk 214)|
|Launched||10 Nov 1942|
|Commissioned||12 Jan 1943||Ltnt. Albert Hossenfelder|
|Successes||No ships sunk or damaged|
Sunk 17 April, 1944 south-west of Iceland, in position 60.32N, 29.20W, by depth charges from a Canadian Catalina aircraft (RCAF Sqdn. 162/S). 51 dead (all hands lost).
Men lost from U-boats
Unlike many other U-boats, which during their service lost men due to accidents and various other causes, U-342 did not suffer any casualties (we know of) until the time of her loss.