Nummer: 21409
| Area : | Baltic Sea |
| Sea area : | Gulf of Finland |
| Date of attack : | 28.06.1941 |
| Time of attack : | 22:56 |
| Nationality of U-boat : | Finnish |
| U-boat : | IKU-TURSO |
| Commander : | Pakkala |
| Grid : | 10sm SW Vaindlo |
| presumed target type : | Submarine |
| presumed result : | target visibly missed |
| Number of torpedoes/mines : | 1 |
| Used weapon(s) : | Torpedo(es) |
| Nationality of target : | Soviet |
| Name of target : | Unterseeboot |
| Actual result : | hit not ascertained |
| Footnote : | "Iku-Turso" fired one torpedo against enemy submarine from 1800 m distance |
| updated on: | 01.08.2013 |
| Remark: | Fehlschuss |
| Changes: | 1) http://kotisivut.fonet.fi/~aromaa/Navygallery/ |