Tammerfors
| Name | Tammerfors |
| Type | Steamer |
| GRT | 994 tons |
| Country |  Russian |
| Built | 1872 |
| Builder | Bergsunds Mek. Verks., Stockholm |
| Operator | Ångfartygs A/B Transito, Åbo |
| History |
U-boat attacks on Steamer Tammerfors
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 26 Feb 1917 | UB 40 (Hans Howaldt) | Sunk | Torpedoed off Barfleur | 49.52N, 00.45W |
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