The Macbain
| Name | The Macbain |
| Type | Sailing vessel |
| GRT | 291 tons |
| Country |  British |
| Built | 1881 |
| Builder | J. Roney, Arbroath |
| Operator | J. T. Crampton & Co., Portsmouth |
| History | Wooden barkentine. |
U-boat attacks on Sailing vessel The Macbain
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 4 Mar 1917 | U 48 (Berndt Buß) | Sunk | Stopped and scuttled 20 miles SSW of Portland Bill | Cherbourg - Fowey | in ballast | 0 |
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