Nummer: 18109
| Area : | Western Area |
| Sea area : | English Channel |
| Date of attack : | 08.06.1944 |
| Time of attack : | 10:44 |
| Nationality of U-boat : | German |
| U-boat : | U 621 |
| Commander : | Stuckmann |
| Grid : | BF 2766 |
| presumed target type : | Destroyer |
| presumed result : | damaged ? |
| Used weapon(s) : | Acoustic homing torpedo (gnat) |
| Convoy : | E.G.12 |
| Actual tonnage : | ---- -- |
| Actual result : | hit not ascertained |
| Footnote : | U-621 reported an end-of-run detonation after 9:17 min. |
| Convoy : | E.G.12 |