Rosborg
| Name | Rosborg |
| Type | Steamer |
| GRT | 1,877 tons |
| Country |  Danish |
| Built | 1907 |
| Builder | Osbourne, Graham & Co., Sunderland |
| Operator | A/S Dampsk. Selsk. Dannebrog (C. K. Hansen), Copenhagen |
| History |
U-boat attacks on Steamer Rosborg
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 3 Mar 1917 | U 61 (Victor Dieckmann) | Sunk | 58.40N, 00.15W | Baltimore - Aarhus via Kirkwall | maize | 6 |
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