Ena
| Name | Ena |
| Type | Fishing vessel (smack) |
| GRT | 56 tons |
| Country |  British |
| Built | 1906 |
| Builder | ?, Lowestoft |
| Operator | Thomas W. Reeve, Lowestoft |
| History | Fishing registration: LT 660 |
U-boat attacks on Fishing vessel (smack) Ena
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 12 Mar 1917 | UC 47 (Paul Hundius) | Sunk | Stopped and scuttled 10 miles NxW of Trevose Head | 50.42N, 05.05W | 0 |
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