Britannia
| Name | Britannia |
| Type | Sailing vessel |
| GRT | 48 tons |
| Country |  British |
| Built | 1896 |
| Builder | Date, Kingsbridge |
| Operator | John H. Davis, Plymouth |
| History | Wooden ketch |
U-boat attacks on Sailing vessel Britannia
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 6 Sep 1916 | UB 23 (Ernst Voigt) | Sunk | Stopped and scuttled 12 miles N of Alderney | London - Jersey | manure | 0 |
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