Viken
| Name | Viken |
| Type | Steamer |
| GRT | 1,825 tons |
| Country |  Swedish |
| Built | 1916 |
| Builder | Lindholmens Mek. Verks., Göteborg |
| Operator | Förnyade Ångfartygs A/B Viking (J. M. Dannberg), Göteborg |
| History |
U-boat attacks on Steamer Viken
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 17 May 1917 | UC 31 (Otto von Schrader) | Sunk | Torpedoed 20 miles E of the Orkneys | Freeport, TX - Göteborg | sulphur | 8 | |
| Master: H. Larsson | ||||||||
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