Istros
| Name | Istros |
| Type | Steamer |
| GRT | 1,891 tons |
| Country |  Greek |
| Built | 1903 |
| Builder | J. L. Thompson & Sons, Ltd., Sunderland |
| Operator | C. A. Theophilatos, Ithaca |
| History |
U-boat attacks on Steamer Istros
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 22 May 1916 | U 34 (Claus Rücker) | Sunk | 40 miles off Farragona | 40° 36'N, 1° 43'E | Cardiff - Genoa | coal | 0 |
Position of attack on Istros
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