Libra
| Name | Libra |
| Type | Sailing vessel |
| GRT | 174 tons |
| Country |  Danish |
| Built | 1909 |
| Builder | N.P. Petersen, Thurø |
| Operator | J.P. Hansen, Thurø |
| History | Three-masted wooden schooner. |
U-boat attacks on Sailing vessel Libra
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 20 Oct 1916 | UB 35 (Otto von Schrader) | Sunk | 57.13N, 02.47E | Drammen - Leith | wood | 0 |
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