List of all U-boats

U-621

Type

VIIC

 
Ordered15 Aug 1940
Laid down1 Jul 1941 Blohm & Voss, Hamburg (werk 597)
Launched19 Mar 1942
Commissioned7 May 1942Kptlt. Horst Sch√ľnemann
Commanders
7 May 1942 - 4 Dec 1942  Kptlt. Horst Sch√ľnemann
4 Dec 1942 - 7 May 1944  Oblt. Max Kruschka
15 May 1944 - 18 Aug 1944  Oblt. Hermann Stuckmann (Knights Cross)
Career
10 patrols
7 May 1942-30 Sep 1942  8. Flottille (training)
1 Oct 1942-18 Aug 1944  9. Flottille (active service)
19 Aug 1943-1 Oct 1943  9. Flottille (active service)
Successes4 ships sunk, total tonnage 20,159 GRT
1 auxiliary warship sunk, total tonnage 2,938 GRT
1 ship damaged, total tonnage 10,048 GRT
1 warship damaged, total tonnage 1,625 tons
Fate

Sunk 18 Aug, 1944 in the Bay of Biscay near La Rochelle, in position 45.52N, 02.36W, by depth charges from the Canadian destroyers HMCS Ottawa, HMCS Kootenay and HMCS Chaudiere. 56 dead (all hands lost).

Loss position

See the 7 ships hit by U-621 - View the 10 war patrols

Refitted as U-Flak 3 on 7 July 1943. Converted back to conventional U-boat.

Wolfpack operations

U-621 operated with the following Wolfpacks during its career:
   Panther (10 Oct 1942 - 16 Oct 1942)
   Puma (16 Oct 1942 - 29 Oct 1942)
   Raufbold (11 Dec 1942 - 18 Dec 1942)
   Hartherz (3 Feb 1943 - 7 Feb 1943)
   Ritter (11 Feb 1943 - 26 Feb 1943)
   Burggraf (4 Mar 1943 - 5 Mar 1943)
   Raubgraf (7 Mar 1943 - 15 Mar 1943)
   Amsel 1 (3 May 1943 - 6 May 1943)
   Elbe (7 May 1943 - 10 May 1943)
   Elbe 2 (10 May 1943 - 14 May 1943)
   Mosel (19 May 1943 - 24 May 1943)

Attacks on this boat and other events

31 May 1943
18.42 hrs, mid Atlantic: While searching for survivors from U-563 sunk nearby, the inbound U-621 was herself attacked by a British Liberator (RAF Sqdn 224/Q, pilot Robert V. Sweeny). The aircraft dropped 12 depth charges on two runs, causing severe damage to the boat. (Sources: Norman Franks)

13 Jan 1944
While serving as a flak boat U-621 was attacked by a British B-24 Liberator (RAF Sqdn 59/A) off the Bay of Biscay. Matrosengefreiter Heinz Thomas was mortally wounded and later buried at sea, and six others were wounded. The commander decided to return to base. U-621 took ten days to limp back to Brest.

11 Apr 1944
Returning from patrol in the Atlantic U-621 ran into an Allied hunter-killer group 900 miles out from her base and fired a torpedo at a "destroyer", but missed. The boat then evaded the hunters and docked at Brest (Sources: Blair, vol 2, page 496)

9 Jun 1944
The boat returned to base at Brest with bomb damage caused by an unidentified aircraft. Date of attack may have been one day earlier. (Sources: Blair, vol 2, page 585)

4 recorded attacks on this boat.

Schnorchel-fitted U-boat
This boat was fitted with a Schnorchel underwater-breathing apparatus in April 1944. Read more about the Schnorchel and see list of fitted boats.

Men lost from the boat

13 Jan 1944
While serving as a flak boat U-621 was attacked by a British B-24 Liberator (RAF Sqdn 59/A) off the Bay of Biscay. Matrosengefreiter Heinz Thomas was mortally wounded and later buried at sea, and six others were wounded. The commander decided to return to base. U-621 took ten days to limp back to Brest.

  Related: For more info on such losses see - Men lost from U-boats -

U-boat Emblems

We have 2 emblem entries for this boat. See the emblem page for this boat or view emblems individually below.


Swordfish and Aircraft

Octopus and Ship

Media links


U-Boat Attack Logs

Daniel Morgan and Bruce Taylor


U-Boat Operations of the Second World War - Vol 2

Wynn, Kenneth


German U-Boat Losses During World War II

Niestle, Axel


Hitler's U-boat War, Vol II

Blair, Clay


Hitler's U-boat War

Blair, Clay