Nummer: 21705b
| Area : | Baltic Sea |
| Sea area : | Gulf of Finland |
| Date of attack : | 24.10.1944 |
| Time of attack : | spät |
| Nationality of U-boat : | German |
| U-boat : | U 958 |
| Commander : | Groth |
| Grid : | AO 0283 |
| presumed target type : | Sailing Freight Vessel |
| presumed result : | sunk |
| Used weapon(s) : | Gunfire |
| Date of observation : | 24.10.1944 |
| Nationality of target : | Finnish |
| Actual type of target : | Sailing Freight Vessel |
| Name of target : | Piikiö |
| Year of launch : | .. |
| Actual tonnage : | .. BRT |
| Actual result : | sunk |
| Position of target : | Odensholm |
| related attacks : | Angriff 1 |