Britannia
| Name | Britannia |
| Type | Steamer |
| GRT | 765 tons |
| Country |  British |
| Built | 1889 |
| Builder | Hall, Russell & Co., Aberdeen |
| Operator | Leith, Hull & Hamburg Steam Packet Co., Ltd. (J. Currie & Co.), Leith |
| History |
U-boat attacks on Steamer Britannia
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 19 Oct 1917 | UC 75 (Johannes Lohs) | Sunk | off Portland Bill | Middlesbrough - Saint Malo | pig iron | 22 | |
| Sunk with all hands and posted as missing. | ||||||||
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