Wolfpacks U-621 was part of
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)