Theresdal
| Name | Theresdal |
| Type | Steamer |
| GRT | 1,762 tons |
| Country |  Norwegian |
| Built | 1889 |
| Builder | T. Turnbull & Son, Whitby |
| Operator | A/S Theresedal af 1904 (Dahl & Co.), Tvedestrand |
| History |
U-boat attacks on Steamer Theresdal
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 19 Jan 1917 | UC 16 (Egon von Werner) | Sunk | off W Ushant | 48° 09'N, 8° 00'W | Bathurst - Liverpool | ground nuts | 0 |
Position of attack on Theresdal
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