Ethel Duncan
| Name | Ethel Duncan |
| Type | Steamer |
| GRT | 2,510 tons |
| Country |  British |
| Built | 1912 |
| Builder | Mackay Bros., Alloa |
| Operator | Ethel Duncan SS. Co., Ltd. (J. T. Duncan & Co.), Cardiff |
| History |
U-boat attacks on Steamer Ethel Duncan
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 18 Oct 1916 | U 20 (Walther Schwieger) | Sunk | 40 miles WNW of Noop Head, Orkneys | 59.25N, 04.36W | Cardiff - ? | coal | 0 |
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