Firth
| Name | Firth |
| Type | Steamer |
| GRT | 406 tons |
| Country |  British |
| Built | 1908 |
| Builder | Hall, Russell & Co., Ltd., Aberdeen |
| Operator | C. R. Davidson & Co., Aberdeen |
| History |
U-boat attacks on Steamer Firth
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 25 Jul 1915 | UB 6 (Erich Haecker) | Sunk | 9 miles N of Shipwash LV or 4 miles ExS of the Aldborough Napes Buoy | Tréport - Methil | in ballast | 4 |
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