Patrol info for U-23
| Departure | Arrival / Fate | Duration | ||
| 27 Jun 1943 | Konstanza | 16 Jul 1943 | Sevastopol | 20 days |
| 18 Jul 1943 | Sevastopol | 19 Jul 1943 | Konstanza | 2 days |
| 22 days | ||||
Commander | Officers * |
 Oblt. Rolf-Birger Wahlen |
Patrol in the Black Sea between Tuapse, Gagra and Sokhumi. On 14 July, the boat had to abort the patrol because the hull was bent in after some struts failed.
Transfer to Konstanza after repairs in Sevastopol.
Daily positions, sinkings and allied attacks during the patrol of U-23
We have 21 daily positions for the 22 days U-23 was at sea.
Departure from Konstanza on 27 Jun 1943.
28 Jun 1943 - 29 Jun 1943 - 30 Jun 1943 - 1 Jul 1943 - 2 Jul 1943 - 3 Jul 1943 - 4 Jul 1943 - 5 Jul 1943 - 6 Jul 1943 - 7 Jul 1943 - 8 Jul 1943 - 9 Jul 1943 - 10 Jul 1943 - 11 Jul 1943 - 12 Jul 1943 - 13 Jul 1943 - 14 Jul 1943 - 15 Jul 1943 - 16 Jul 1943 - 17 Jul 1943 - 18 Jul 1943 -
Arrival at Konstanza on 19 Jul 1943.
Ships hit by U-23 during this patrol
General Events during this patrol
1943
30 Jun 1943. U-23 encountered a Soviet submarine in the Black Sea, but neither boat attacked.
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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.