A Portuguesa
| Name | A Portuguesa |
| Type | Sailing vessel |
| GRT | 107 tons |
| Country |  Portuguese |
| Built | 1892 |
| Builder | ?, Fao |
| Operator | Arthur Jose Rebelo de Lima, Oporto |
| History | Wooden schooner |
U-boat attacks on Sailing vessel A Portuguesa
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 11 Dec 1917 | UB 55 (Ralph Wenninger) | Sunk | Stopped and sunk off Leixoes harbor | Lisbon - Oporto | salt |
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