Nummer: 05521
| Area : | Western Area |
| Sea area : | West African Coast |
| Date of attack : | 08.06.1941 |
| Time of attack : | 04:42 |
| Nationality of U-boat : | German |
| U-boat : | U 107 |
| Commander : | Heßler |
| Grid : | ET 2934 |
| presumed target type : | Steam Freighter id |
| presumed tonnage : | 7818 BRT |
| presumed result : | sunk |
| Number of torpedoes/mines : | 1 |
| Used weapon(s) : | Torpedo(es) |
| Date of observation : | 08.06.1941 |
| Nationality of target : | British |
| Actual type of target : | Passenger Vessel |
| Name of target : | Adda |
| Year of launch : | 1922 |
| Actual tonnage : | 7816 BRT |
| Actual result : | sunk |
| Position of target : | 08.30n 14.39w |
| updated on: | 00.00.2002 |
| Remark: | -MP |