Alwyn
| Name | Alwyn |
| Type | Sailing vessel |
| GRT | 73 tons |
| Country |  British |
| Built | 1885 |
| Builder | Watson & Fox, Plymouth |
| Operator | W. Wood & J. Hay, Portsoy, Banffshire |
| History | Wooden ketch. |
U-boat attacks on Sailing vessel Alwyn
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 12 Jun 1917 | UB 41 (Günther Krause) | Sunk | Stopped and scuttled 5 miles SE of Girdleness | 57° 05'N, 1° 55'W | Sunderland - Banff | coal | 0 |
Position of attack on Alwyn
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