Thomas
| Name | Thomas |
| Type | Sailing vessel |
| GRT | 132 tons |
| Country |  British |
| Built | 1908 |
| Builder | ?, Mandal |
| Operator | A.S. Rendell, Shelburne, Nova Scotia |
| History | Wooden three-masted schooner. |
U-boat attacks on Sailing vessel Thomas
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 18 Apr 1917 | UC 27 (Gerhard Schulz) | Sunk | Stopped and scuttled 40 miles SE of Cape St. Vincent | Cadiz - Rose Blanche | salt | 0 |
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