Nummer: 18417
| Area : | Western Area |
| Sea area : | English Channel |
| Date of attack : | 21.08.1944 |
| Time of attack : | 11:40 |
| Nationality of U-boat : | German |
| U-boat : | U 480 |
| Commander : | Förster |
| Grid : | BF 3274 |
| presumed target type : | Fregate |
| presumed result : | sunk |
| Used weapon(s) : | Acoustic homing torpedo (gnat) |
| Convoy : | unknown |
| Date of observation : | 21.08.1944 |
| Nationality of target : | Canadian |
| Actual type of target : | Corvette |
| Name of target : | Alberni (K.103) |
| Year of launch : | 1940 |
| Actual tonnage : | 925 ts |
| Actual result : | sunk |
| Position of target : | 50.18n 00.51w |
| Convoy : | unknown |