Harald
| Name | Harald |
| Type | Sailing vessel |
| GRT | 275 tons |
| Country |  Swedish |
| Built | 1901 |
| Builder | |
| Operator | C. Wingren |
| History | Possibly built by K. Preede, Ploenzeem |
U-boat attacks on Sailing vessel Harald
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 5 May 1916 | UB 21 (Ernst Hashagen) | Sunk | Stopped and sunk in the North Sea | Göteborg - Tyne | pit props | 0 |
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