Spro
| Name | Spro |
| Type | steamer |
| GRT | 1,507 tons |
| Country |  Norwegian |
| Built | 1882 |
| Builder | W. Doxford & Sons, Sunderland |
| Operator | A/S Frogner (Alexander Bech), Christiania |
| History |
U-boat attacks on steamer Spro
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 21 Dec 1917 | U 104 (Kurt Bernis) | Sunk | 4 miles SW Iles des Glenans, Brittany | 47.36N, 04.04W | Barry Dock - La Pallice | coal | 12 |
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