List of all U-boats




Ordered10 Apr 1941
Laid down16 Mar 1942 Danziger Werft AG, Danzig (werk 124)
Launched7 Nov 1942
Commissioned3 Mar 1943Oblt. Joachim Methner
3 Mar 1943 - 26 Sep 1943  Oblt. Joachim Methner
27 Sep 1943 - Oct, 1943   Hinrich Kelling
Oct, 1943 - 17 Jun 1944  Oblt. Klaus Hackländer
1 patrol
3 Mar 1943-17 Jun 1944  8. Flottille (training)
SuccessesNo ships sunk or damaged

Sunk on 17 June 1944 in the Norwegian Sea north-east of the Shetland Islands, in position 63.06N, 02.05E, by depth charges from a Norwegian Catalina aircraft (333 Sqn RAF/D). 53 dead (all hands lost).

Loss position

View the 1 war patrol

Men lost from U-boats

Unlike many other U-boats, which during their service lost men due to accidents and various other causes, U-423 did not suffer any casualties (we know of) until the time of her loss.

U-boat Emblems

We have 1 emblem entry for this boat. See the emblem page for this boat or view emblems individually below.


Media links

U-Boat Operations of the Second World War - Vol 1

Wynn, Kenneth

Hitler's U-boat War, Vol II

Blair, Clay

German U-Boat Losses During World War II

Niestle, Axel