Unidentified Sailing Vessel
| Name | Unidentified Sailing Vessel |
| Type | Sailing vessel |
| GRT | 300 tons |
| Country |  Russian |
| Built | |
| Builder | |
| Operator | |
| History | Estimated tonnage, in reality probably lower. |
U-boat attacks on Sailing vessel Unidentified Sailing Vessel
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 28 Apr 1916 | U 33 (Konrad Gansser) | Sunk | near Sochi (Sutcha) in the Black Sea |
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