Giskö
| Name | Giskö |
| Type | steamer |
| GRT | 1,643 tons |
| Country |  Norwegian |
| Built | 1880 |
| Builder | W. Gray & Co., West Hartlepool |
| Operator | A/S Giskø (P. A. Musæus), Aalesund |
| History |
U-boat attacks on steamer Giskö
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 22 Apr 1917 | U 21 (Otto Hersing) | Sunk | North Sea | 61° 03'N, 3° 28'E | Ålesund - Hull | general cargo | 0 |
Position of attack on Giskö
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