Nummer: 18611
| Area : | Western Area |
| Sea area : | US East Coast |
| Date of attack : | 25.11.1944 |
| Time of attack : | 02:30 |
| Nationality of U-boat : | German |
| U-boat : | U 1228 |
| Commander : | Marienfeld |
| Grid : | BB 5512 |
| presumed target type : | Destroyer |
| presumed tonnage : | 900 ts |
| presumed result : | sunk |
| Used weapon(s) : | Acoustic homing torpedo (gnat) |
| Date of observation : | 25.11.1944 |
| Time of observation : | 12:34 |
| Nationality of target : | Canadian |
| Actual type of target : | Corvette |
| Name of target : | Shawinigan (K.136) |
| Year of launch : | 1941 |
| Actual tonnage : | 900 ts |
| Actual result : | sunk |
| Position of target : | 47.34n 59.11w |