Olga
| Name | Olga |
| Type | Sailing vessel |
| GRT | 83 tons |
| Country |  Swedish |
| Built | 1915 |
| Builder | |
| Operator | Carl Axel Hedén, Stockholm |
| History |
U-boat attacks on Sailing vessel Olga
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 19 May 1917 | UC 58 (Karl Vesper) | Sunk | off the Finnish coast | Stockholm - Raumo | Siliceous iron | 0 |
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