Njaal
| Name | Njaal |
| Type | Sailing vessel |
| GRT | 578 tons |
| Country |  Russian |
| Built | 1881 |
| Builder | C. Abrahsmson, Soon |
| Operator | Lindstrom & Co., Mariehamn |
| History | Wooden bark. |
U-boat attacks on Sailing vessel Njaal
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 12 Apr 1918 | U 104 (Kurt Bernis) | Sunk | North Sea, off Flekkefjord | West Hartlepool - Marviken | coal |
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