Nummer: 17811b
| Area : | Western Area |
| Sea area : | North Atlantic |
| Date of attack : | 19.02.1944 |
| Time of attack : | 04:24 |
| Nationality of U-boat : | German |
| U-boat : | U 437 |
| Commander : | Lamby |
| Grid : | BE 1976 |
| presumed target type : | Destroyer |
| presumed result : | sunk |
| Used weapon(s) : | Acoustic homing torpedo (gnat) |
| Footnote : | U-437 heard two gnat detonations after 6 min and 8 min. |
| related attacks : | Angriff 1 |