Hagios Triast
| Name | Hagios Triast |
| Type | Sailing vessel |
| GRT | 22 tons |
| Country |  Greek |
| Built | |
| Builder | |
| Operator | |
| History |
U-boat attacks on Sailing vessel Hagios Triast
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 28 Feb 1918 | UC 23 (Hans Georg Lübbe) | Sunk | off the Doro Channel |
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