Rio Pirahy
| Name | Rio Pirahy |
| Type | Steamer |
| GRT | 3,561 tons |
| Country |  British |
| Built | 1901 |
| Builder | J. Readhead & Sons, South Shields |
| Operator | West of England Shipping Co., Ltd. (Geo. C. Shepton), London |
| History |
U-boat attacks on Steamer Rio Pirahy
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 28 Oct 1916 | U 63 (Otto Schultze) | Sunk | Stopped and scuttled 60 miles S of Cape St. Vincent | Livorno - Barry Roads | in ballast | 0 |
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