Olga
| Name | Olga |
| Type | Steamer |
| GRT | 1,672 tons |
| Country |  Russian |
| Built | 1880 |
| Builder | Short Bros., Sunderland |
| Operator | Helmsing & Grimm, Riga |
| History |
U-boat attacks on Steamer Olga
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 28 Apr 1917 | U 45 (Erich Sittenfeld) | Sunk | Stopped after an artillery exchange and scuttled 89 miles off the North Cape | Newcastle - Kola | coal |
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