Alert
| Name | Alert |
| Type | Sailing vessel |
| GRT | 59 tons |
| Country |  British |
| Built | 1885 |
| Builder | Page & Co., Lowestoft |
| Operator | Alexander M. Pirie, Buckie |
| History | Wooden dandy. |
U-boat attacks on Sailing vessel Alert
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 31 May 1918 | UB 40 (Hans Joachim Emsmann) | Sunk | Stopped and scuttled 6 miles NE of Boulmer | Seaham - Peterhead | coal | 0 | |
| Location also given as 9 miles NExN1/2N of Coquet Island. | ||||||||
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