Patrol info for U-821
| Departure | Arrival / Fate | Duration | ||
| 19 Mar 1944 | Bergen | 12 Apr 1944 | Brest | 25 days |
Commander | Officers * |
 Oblt. Ulrich Knackfuß |
Daily positions, sinkings and allied attacks during the patrol of U-821
Legend
indicates an Allied attack on the boat.
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We have daily positions for all 25 days on this patrol.
Departure from Bergen on 19 Mar 1944.
20 Mar 1944 - 21 Mar 1944 - 22 Mar 1944 - 23 Mar 1944 - 24 Mar 1944 - 25 Mar 1944 - 26 Mar 1944 - 27 Mar 1944 - 28 Mar 1944 - 29 Mar 1944 - 30 Mar 1944 - 31 Mar 1944 - 1 Apr 1944 - 2 Apr 1944 - 3 Apr 1944 - 4 Apr 1944 - 5 Apr 1944 - 6 Apr 1944 - 7 Apr 1944 - 8 Apr 1944 - 9 Apr 1944 - 10 Apr 1944 - 11 Apr 1944 -
Arrival at Brest on 12 Apr 1944.
Ships hit by U-821 during this patrol
No entries found.
General Events during this patrol
We have no events listed for this patrol.
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Attacks on U-821 during this patrol
10 Apr 1944
At 03.04 hours, the inbound boat was attacked by the Leigh Light equipped Liberator Mk.V aircraft BZ781 (53 Sqdn RAF/A, pilot F/O W.J. Irving, RCAF) after being picked up by radar in the Bay of Biscay. The depth charges failed to release on the first attack run and also hung up during the next two passes, possibly because the aircraft had been hit in the bomb bay by AA fire during the second approach. The undamaged U-821 escaped further strafing attacks by crash-diving after 20 minutes. The Liberator left for home with an inoperable rear gun turret and damaged hydraulics and nose wheel as the crew noticed before landing, yet they managed to land without flaps or brakes at the first light - the pilot later recieved the DFC. (Sources: Franks/Zimmerman)
About this data
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* These are officers that later became commanders themselves.
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