Nummer: 17804
| Area : | Western Area |
| Sea area : | North Atlantic |
| Date of attack : | 11.02.1944 |
| Time of attack : | 04:24 |
| Nationality of U-boat : | German |
| U-boat : | U 413 |
| Commander : | Poel |
| Grid : | BE 6121 |
| presumed target type : | Destroyer |
| presumed result : | sunk ? |
| Used weapon(s) : | Acoustic homing torpedo (gnat) |
| Convoy : | OS.67 |
| Actual tonnage : | ---- -- |
| Actual result : | hit not ascertained |
| Footnote : | U-413 heard two gnat end-of-run detonations after 11:24 min and 12:24 min. |
| Convoy : | OS.67 |
| Route of convoy : | London / Liverpool - Freetown (Sierra Leone) |
| Remark to convoy : | Since Jul 1941, from Apr 1943 combined with KMS in Atlantic (counter traffic = SL) |