Picton Castle
| Name | Picton Castle |
| Type | Navy Trawler |
| GRT | 245 tons |
| Country |  British |
| Built | 1911 |
| Builder | Smith Dock Co. Ltd., Middlesbrough |
| Operator | Royal Navy |
| History | Peace-time operator: Castle Steam Trawlers Co. Ltd, Swansea |
U-boat attacks on Navy Trawler Picton Castle
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 19 Feb 1917 | UC 17 (Ralph Wenninger) | Sunk | Mined 3 m SE of Dartmouth harbour | 12 | |||
| Official Number: 128919 | ||||||||
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