HMT Agate
| Name | HMT Agate |
| Type | Navy Trawler |
| GRT | 248 tons |
| Country |  British |
| Built | 1913 |
| Builder | Cochrane & Sons Ltd., Selby |
| Operator | Royal Navy |
| History | Peace-time operator: Kingston Steam Trawling Co. Ltd., Hull |
U-boat attacks on Navy Trawler Agate
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 14 Mar 1918 | UC 71 (Walter Warzecha) | Sunk | Mined off the Royal Sovereign LV | 4 |
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