Eldra
| Name | Eldra |
| Type | Sailing vessel |
| GRT | 227 tons |
| Country |  British |
| Built | 1873 |
| Builder | Hill & Son, Plymouth |
| Operator | A.H. Monkhouse, Teignmouth |
| History | Wooden barkentine. |
U-boat attacks on Sailing vessel Eldra
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 19 Oct 1917 | UC 77 (Reinhard von Rabenau) | Sunk | Stopped and sunk 35 miles NW of Le Tréport, France | Swansea - Tréport | coal | 0 |
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