List of all U-boats




Ordered23 Sep 1939
Laid down4 Jun 1940 Danziger Werft AG, Danzig (werk 105)
Launched4 Jun 1941
Commissioned6 Aug 1941Kptlt. Otto von Bülow (Oak Leaves)
6 Aug 1941 - 19 Jul 1943  KrvKpt. Otto von Bülow (Knights Cross)
20 Jul 1943 - 28 Jul 1943  Oblt. Adolf Schönberg
7 patrols
6 Aug 1941-1 Jan 1942  6. Flottille (training)
1 Jan 1942-28 Jul 1943  6. Flottille (active service)
Successes14 ships sunk, total tonnage 71,450 GRT
1 warship sunk, total tonnage 1,120 tons
2 ships damaged, total tonnage 16,689 GRT

Sunk on 28 July 1943 in the Bay of Biscay north-west of Cape Ortegal, Spain, in position 45.53N, 09.25W, by depth charges from two US Liberator aircraft (4th A/S Sqn USAAF/Y & N) and a British Liberator aircraft (224 Sqn RAF/W). 51 dead (all hands lost).

Loss position

See the 17 ships hit by U-404 - View the 7 war patrols

Wolfpack operations

U-404 operated with the following Wolfpacks during its career:
   Schlei (21 Jan 1942 - 24 Jan 1942)
   Hecht (8 May 1942 - 11 May 1942)
   Pfadfinder (23 May 1942 - 27 May 1942)
   Stier (29 Aug 1942 - 2 Sep 1942)
   Vorwärts (2 Sep 1942 - 26 Sep 1942)
   Luchs (27 Sep 1942 - 29 Sep 1942)
   Letzte Ritter (29 Sep 1942 - 1 Oct 1942)
   Falke (28 Dec 1942 - 19 Jan 1943)
   Landsknecht (19 Jan 1943 - 28 Jan 1943)
   Without name (27 Mar 1943 - 30 Mar 1943)
   Adler (7 Apr 1943 - 13 Apr 1943)
   Meise (13 Apr 1943 - 20 Apr 1943)
   Specht (21 Apr 1943 - 25 Apr 1943)

Attacks on this boat and other events

26 Jan 1942
The periscope was damaged in an air attack in the North Atlantic.

28 Jul 1943
The sinking of U-404 At 1107hrs the boat was located following radar contact by a US B-24 Liberator (4th A/S Sqn USAAF/Y, pilot Maj Stephen McElroy), but on attacking the depth charges failed to release. The aircraft waited for the boat to resurface and attacked again at 1517hrs. Despite a 20mm shell detonating inside the cockpit (without hurting anyone), the pilot dropped eight depth charges into the boats diving point. Flak damage to the radio and one engine then forced the aircraft to return to base. Another US Liberator (4th A/S Sqn USAAF/N, pilot 1Lt Arthur J. Hammer) then attacked U-404 twice after she surfaced again at 1745hrs. Flak damage also forced this aircraft to return to base, this time to one engine, the tail and the fuselage. The last attack was observed by a third Liberator, British BZ781 (224 Sqn RAF/W, pilot F/O R.V. Sweeny), which this time attacked and sank the boat. Yet again, one engine was hit by flak, and the plane barely made it back to base after jettisoning all guns and loose equipment. (Sources: Franks/Zimmerman)

2 recorded attacks 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-404 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 Attack Logs

Daniel Morgan and Bruce Taylor

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

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

The Approaching Storm

Chewning, Alpheus J.