Vianna
| Name | Vianna |
| Type | Steamer |
| GRT | 401 tons |
| Country |  British |
| Built | 1899 |
| Builder | Schiffswerft von Henry Koch, Lübeck |
| Operator | Admiralty requisition (Everett & Newbigin), London |
| History |
U-boat attacks on Steamer Vianna
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 31 Mar 1918 | UC 64 (Ferdinand Schwartz) | Sunk | 4 miles east of Seaham Harbour | 54° 50'N, 1° 12'W | Tyne - Ipswich | coal | 4 |
Position of attack on Vianna
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