Patrol info for U-21
| Departure | Arrival / Fate | Duration | ||
| 22 Oct 1939 | Kiel | 8 Nov 1939 | Kiel | 18 days |
Commander | Officers * |
 Kptlt. Fritz Frauenheim |
WO Oblt. Robert Bartels |
Mine laying operation in the Firth of Forth.
Daily positions, sinkings and allied attacks during the patrol of U-21
We have 2 daily positions for the 18 days U-21 was at sea.
Departure from Kiel on 22 Oct 1939.
23 Oct 1939 - 24 Oct 1939 - 25 Oct 1939 - 26 Oct 1939 - 27 Oct 1939 - 28 Oct 1939 - 29 Oct 1939 - 30 Oct 1939 - 31 Oct 1939 - 1 Nov 1939 - 2 Nov 1939 - 3 Nov 1939 - 4 Nov 1939 - 5 Nov 1939 - 6 Nov 1939 - 7 Nov 1939 -
Arrival at Kiel on 8 Nov 1939.
Ships hit by U-21 during this patrol
| Date | U-boat | Commander | Name of ship | Tons | Nat. | Convoy | Map | ||
|---|---|---|---|---|---|---|---|---|---|
| 21 Nov 1939 | U-21 | Fritz Frauenheim |  | HMS Belfast (35) (d.) [Mine] | 11,500 |  | br | A | |
| 24 Feb 1940 | U-21 | Fritz Frauenheim | | Royal Archer [Mine] | 2,266 | | br | FN-100 | B |
| 13,766 | |||||||||
1 ship sunk (2,266 tons) and 1 ship damaged (11,500 tons). Legend | |||||||||
General Events during this patrol
1939
4 Nov 1939. U-21 laid nine mines in the Firth of Forth, which later resulted in the sinking of two ships and badly damaged the light cruiser HMS Belfast.
Add more events! If you know of an interesting event either missing from this date or an upcoming event that you'd like to share please contact us. We continuously update these databases.
Attacks on U-21 during this patrol
6 Nov 1939
HMS Sealion (Lt.Cdr. B. Bryant, RN) fired six torpedoes at U-21, all of which missed their target.
About this data
If you believe we have missed an attack on a German U-boat in this listing please let us know.
Mine-laying operations during this patrol
U-21 laid mines on the following dates during this patrol:
| Date | Start | End | Grid | Location | Mines |
|---|---|---|---|---|---|
| 4 Nov 1939 | 23h44 | 00h53 | AN 0537 | Firth of Forth | 9 TMB |
See all patrols for U-21
* These are officers that later became commanders themselves.