Alert
| Name | Alert |
| Type | Steamer |
| GRT | 289 tons |
| Country |  British |
| Built | 1897 |
| Builder | Dundee SB. Co., Ltd., Dundee |
| Operator | J.B. Knapton, London |
| History |
U-boat attacks on Steamer Alert
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 28 Nov 1916 | UB 39 (Heinrich Küstner) | Sunk | Stopped and scuttled 6 miles ENE of Owers LV | Havre - Littlehampton | in ballast | 0 |
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