Margrethe
| Name | Margrethe |
| Type | Fishing vessel (smack) |
| GRT | 104 tons |
| Country |  Danish |
| Built | 1884 |
| Builder | S. Dewdney & Sons, Brixham |
| Operator | J. H. Isaksen, Viderejde, Faroe Islands |
| History | Wooden smack. Built as Inflexible. |
U-boat attacks on Fishing vessel (smack) Margrethe
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 23 May 1917 | UC 33 (Martin Schelle) | Sunk | Stopped and sunk off the Faroe Bank | 0 |
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