Dagny
Photo courtesy of Danish Maritime Museum, Elsinore
| Name | Dagny |
| Type | Steamer |
| GRT | 1,220 tons |
| Country |  Danish |
| Built | 1901 |
| Builder | W. Gray & Co., Ltd., West Hartlepool |
| Operator | A/S Dampsk. Selsk. Heimdal (M. Carl), Copenhagen |
| History |
U-boat attacks on Steamer Dagny
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 6 Jan 1918 | U 93 (Helmut Gerlach) | Sunk | Torpedoed 4 miles SSW of Penmarch | Port Talbot - Bordeaux | coal | 2 |
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