Effort
| Name | Effort |
| Type | Trawler |
| GRT | 159 tons |
| Country |  British |
| Built | 1895 |
| Builder | Mackie & Thomson, Govan |
| Operator | Thos. Lauder, Aberdeen |
| History |
U-boat attacks on Trawler Effort
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 22 Oct 1916 | UB 34 (Theodor Schultz) | Sunk | Stopped and sunk 30 miles ENE of Buchan Ness | 0 |
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