Mary Boyes
| Name | Mary Boyes |
| Type | Fishing vessel (sail) |
| GRT | 101 tons |
| Country |  Danish |
| Built | 1886 |
| Builder | J.W. & A., Brixham |
| Operator | S. Nielsen, Thorshavn |
| History |
U-boat attacks on Fishing vessel (sail) Mary Boyes
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 3 Jul 1917 | U 49 (Richard Hartmann) | Sunk | Stopped and sunk W of the Shetlands | 60.09N, 05.50W | Stornoway - Faroes | in ballast | 0 |
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