Nummer: 25308
| Area : | Mediterranean |
| Sea area : | Western Mediterranean |
| Date of attack : | 12.12.1943 |
| Nationality of U-boat : | German |
| U-boat : | U 593 |
| Commander : | Kelbling |
| Grid : | CH 9653 |
| Used weapon(s) : | Acoustic homing torpedo (gnat) |
| Convoy : | KMS.34 |
| Date of observation : | 12.12.1943 |
| Time of observation : | 14:45 |
| Nationality of target : | British |
| Actual type of target : | Destroyer Escort |
| Name of target : | Holcombe (L.56) |
| Year of launch : | 1942 |
| Actual tonnage : | 1087 ts |
| Actual result : | sunk |
| Position of target : | 37.20n 05.30e |
| Convoy : | KMS.34 |
| Route of convoy : | United Kingdom - Gibraltar - Port Said (slow) |
| Remark to convoy : | Since Oct 1942; since May 1943 combined mit OS in Atlantic (counter traffic = MKS) |