Nummer: 21417
| Area : | Baltic Sea |
| Sea area : | Gulf of Finland |
| Date of minelaying : | 22.06.1941 |
| Nationality of U-boat : | Finnish |
| U-boat : | IKU-TURSO |
| Commander : | Pekkanen |
| Grid : | F4 barrage |
| presumed target type : | --- |
| presumed tonnage : | ---- --- |
| presumed result : | hit not ascertained |
| Used weapon(s) : | Sea mine(s) |
| Date of sinking : | 05.07.1941 |
| Time of sinking : | 09:15 |
| Nationality of target : | Latvian |
| Actual type of target : | Steam Freighter |
| Name of target : | Rasma |
| Year of launch : | 1902 |
| Actual tonnage : | 3204 BRT |
| Actual result : | not repaired, total loss |
| Position of target : | Mochni I. / N Ekholm |
| Footnote : | "Rasma" was beached after being struck by a mine either in the area of mine barrage F.3 (laid by Vesihiisi on Jun.22nd) or mine barrage F.4 (laid by Iku-Turso on Jun.22nd) near Isle of Mochni. - On July,10th the wreck was destroyed by 1 or 2 torpedoes from the german MTB S-26 and S-28. |