Nummer: 18704
| Area : | Western Area |
| Sea area : | English Channel |
| Date of attack : | 21.12.1944 |
| Nationality of U-boat : | German |
| U-boat : | U 486 |
| Commander : | Meyer |
| Grid : | BF 3516 |
| presumed target type : | Destroyer |
| presumed result : | sunk |
| Number of torpedoes/mines : | 3 |
| Used weapon(s) : | Acoustic homing torpedo (gnat) |
| Convoy : | unknown |
| Footnote : | U-486 heard a gnat detonation after 1:09 min. |
| Convoy : | unknown |