Patrol info for U-23
| Departure | Arrival / Fate | Duration | ||
| 9 Feb 1940 | Wilhelmshaven | 25 Feb 1940 | Wilhelmshaven | 17 days |
Commander | Officers * |
 Kptlt. Otto Kretschmer |
2WO Oblt. Hans-Diedrich Freiherr von Tiesenhausen |
Patrol in the North Sea off the Shetland and Orkney Islands. The boat participated in the operation Nordmark together with U-14, U-22, U-57, U-61 and U-63. The U-boats were placed off the British bases on the Shetland and Orkney Islands for reconnaissance during an unsuccessful sortie of the German battlecruisers Scharnhorst and Gneisenau, the heavy cruiser Admiral Hipper and three destroyers against the British convoys between Norway and Britain between 18 and 20 February.
Daily positions, sinkings and allied attacks during the patrol of U-23
We have 16 daily positions for the 17 days U-23 was at sea.
Departure from Wilhelmshaven on 9 Feb 1940.
10 Feb 1940 - 11 Feb 1940 - 12 Feb 1940 - 13 Feb 1940 - 14 Feb 1940 - 15 Feb 1940 - 16 Feb 1940 - 17 Feb 1940 - 18 Feb 1940 - 19 Feb 1940 - 20 Feb 1940 - 21 Feb 1940 - 22 Feb 1940 - 23 Feb 1940 - 24 Feb 1940 - 25 Feb 1940 -
Ships hit by U-23 during this patrol
| Date | U-boat | Commander | Name of ship | Tons | Nat. | Convoy | Map | ||
|---|---|---|---|---|---|---|---|---|---|
| 18 Feb 1940 | U-23 | Otto Kretschmer |  | HMS Daring (H 16) | 1,375 |  | br | HN-12 | A |
| 19 Feb 1940 | U-23 | Otto Kretschmer | | Tiberton | 5,225 | | br | B | |
| 22 Feb 1940 | U-23 | Otto Kretschmer | | Loch Maddy (t.) | 4,996 | | br | HX-19 | C |
| 11,596 | |||||||||
3 ships sunk (11,596 tons). Legend | |||||||||
General Events during this patrol
We have no events listed for this patrol.
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Attacks on U-23 during this patrol
We have no recorded attacks on U-23 duing this patrol.
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See all patrols for U-23
* These are officers that later became commanders themselves.