Nummer: 18622
| Area : | Western Area |
| Sea area : | North Atlantic |
| Date of attack : | 15.12.1944 |
| Nationality of U-boat : | German |
| U-boat : | U 991 |
| Commander : | Balke |
| Grid : | AM 8883 |
| presumed target type : | Steam Freighter |
| presumed tonnage : | 7000 BRT |
| presumed result : | sunk |
| Used weapon(s) : | Torpedo(es) |
| Convoy : | unknown |
| Footnote : | U-991 reported a "Liberty" type ship sunk. |
| Convoy : | unknown |