|Ordered||15 Aug 1940|
|Laid down||31 Mar 1941||Howaldtswerke Hamburg AG, Hamburg (werk 812)|
|Launched||26 Mar 1942|
|Commissioned||14 May 1942||Kptlt. Heinrich Schmid|
|Successes||2 ships sunk, total tonnage 10,924 GRT|
Sunk 8 May, 1943 in the Bay of Biscay west of Brest, in position 46.50N, 10.00W, after being damaged by depth charges from an Australian Sunderland aircraft (RAAF Sqdn. 10/W) during an attack on 7 May. 49 dead (all hands lost). (Axel Niestlé, November 1989).
The boat reported in after the attack but was never heard from again. She must have suffered major hull failures during the attack and sunk as a result of those.
Previously recorded fate
- Sunk by the British Halifax aircraft (RAF 58/S) on 7 May 1943 in position 46.33N, 11.12W. (Postwar assessment)
Notes. This attack was in fact against the U-214 causing minor damages.
U-663 operated with the following Wolfpacks during its career:
Drachen (22 Nov 1942 - 3 Dec 1942)
Panzer (3 Dec 1942 - 9 Dec 1942)
Büffel (9 Dec 1942 - 14 Dec 1942)
Seeteufel (21 Mar 1943 - 30 Mar 1943)
Attacks on this boat
7 May 1943
A depth charge attack on 7 May, 1943 in the Bay of Biscay west of St. Nazaire, France in position 47.06N, 10.58W by Australian Sunderland flying boat W/William of 10 Sqdn RAAF is often credited with sinking U-465.
The target was actually U-663, which was severely damaged rather than sunk. (Sources: 1989-11-01, Axel Niestle)
1 recorded attack on this boat.
Men lost from U-boats
Unlike many other U-boats, which during their service lost men due to accidents and various other causes, U-663 did not suffer any casualties (we know of) until the time of her loss.