Alastair
| Name | Alastair |
| Type | Steamer |
| GRT | 366 tons |
| Country |  British |
| Built | 1902 |
| Builder | J. Duthie, Sons & Co., Aberdeen |
| Operator | J. & W. Henderson, Ltd. (J. & W. Henderson), Aberdeen |
| History |
U-boat attacks on Steamer Alastair
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 6 Nov 1915 | UC 3 (Erwin Waßner) | Sunk | Mined 4 miles E of Southwold | London - Tyne | burnt ore | 7 |
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