Ada
| Name | Ada |
| Type | Sailing vessel |
| GRT | 179 tons |
| Country |  Italian |
| Built | 1893 |
| Builder | L. Menetto, Chioggia |
| Operator | Fili. Mantera di V., Salerno |
| History | Wooden brigantine. |
U-boat attacks on Sailing vessel Ada
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 29 Jan 1918 | UB 49 (Hans von Mellenthin) | Sunk | Stopped and scuttled off the west coast of Italy | 41.20N, 12.40E |
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