Ragna
| Name | Ragna |
| Type | Steamer |
| GRT | 1,747 tons |
| Country |  Norwegian |
| Built | 1892 |
| Builder | Wood, Skinner & Co., Newcastle |
| Operator | Nils Røgenæs, Haugesund |
| History |
U-boat attacks on Steamer Ragna
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 23 Dec 1917 | UB 54 (Egon von Werner) | Sunk | 16 miles NW½W off Cap de la Heve Lighthouse, Le Havre | Barry Dock - Rouen | coal | 0 |
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