Nummer: 18612
| Area : | Western Area |
| Sea area : | English Channel |
| Date of attack : | 27.11.1944 |
| Nationality of U-boat : | German |
| U-boat : | U 991 |
| Commander : | Balke |
| Grid : | BF 3525 |
| presumed target type : | Passenger Liner |
| presumed tonnage : | 14000 BRT |
| presumed result : | damaged |
| Number of torpedoes/mines : | 3- |
| Used weapon(s) : | Torpedo(es) |
| Convoy : | unknown |
| Footnote : | U-991 fired a 3-torpedo spread and heard two detonations. |
| Convoy : | unknown |