Caledonia
| Name | Caledonia |
| Type | Trawler |
| GRT | 161 tons |
| Country |  British |
| Built | 1906 |
| Builder | Hall, Russell & Co., Ltd., Aberdeen |
| Operator | Thomas L. Devlin, Granton |
| History | Listed as hired by the Royal Navy but not (yet?) a commissioned vessel; possibly en route for conversion into a Q-ship. |
U-boat attacks on Trawler Caledonia
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 17 Mar 1917 | UC 50 (Rudolf Seuffer) | Sunk | off Newton |
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