Sognedalen
| Name | Sognedalen |
| Type | Sailing vessel |
| GRT | 644 tons |
| Country |  Norwegian |
| Built | 1864 |
| Builder | J. Petterson, Oulu/Uleåborg |
| Operator | H. G. Andersen, Fredrikstad |
| History |
U-boat attacks on Sailing vessel Sognedalen
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 25 Jul 1915 | U 6 (Reinhold Lepsius) | Sunk | 56° 26'N, 2° 26'E | Fredrikstad – Middlebrough | planed wood | 0 |
Position of attack on Sognedalen
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