Blenheim
| Name | Blenheim |
| Type | Bark |
| GRT | 1,144 tons |
| Country |  Norwegian |
| Built | 1877 |
| Builder | A. Stephen & Sons, Glasgow |
| Operator | A/S Blenheim (A. Olsen Rød), Fredrikstad |
| History |
U-boat attacks on Bark Blenheim
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 22 Feb 1917 | U 50 (Gerhard Berger) | Sunk | 30 miles SSW of Fastnet | Pensacola – Greenock | pitch pine | 0 |
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