Nummer: 17117
| Area : | Western Area |
| Sea area : | North Atlantic |
| Date of attack : | 21.09.1943 |
| Time of attack : | 01:27 |
| Nationality of U-boat : | German |
| U-boat : | U 641 |
| Commander : | Rendtel |
| Grid : | AK 2936 |
| presumed target type : | Destroyer |
| presumed result : | sunk |
| Used weapon(s) : | Acoustic homing torpedo (gnat) |
| Convoy : | ON.202 |
| Actual tonnage : | ---- -- |
| Actual result : | hit not ascertained |
| Convoy : | ON.202 |
| Route of convoy : | United Kingdom - North America |
| Remark to convoy : | 1st series: Jul 1941 to Mar 1943 ON and ONS combined, later ON mit continuing and ONS with new numbering (counter traffic HX and SC) |