Alcyone
| Name | Alcyone |
| Type | Motor vessel |
| GRT | 149 tons |
| Country |  British |
| Built | 1893 |
| Builder | L. Tranchemer, La Richardais |
| Operator | Italian Export Shipping Co. Ltd. (D.P. Barnett & Co.), Cardiff |
| History |
U-boat attacks on Motor vessel Alcyone
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 1 Aug 1917 | UB 31 (Thomas Bieber) | Sunk | Stopped and sunk by gunnery 45 miles NNW of Roches Douvres | Cardiff - St. Brieuc | coal | 0 |
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