Garthwaite
| Name | Garthwaite |
| Type | Steamer |
| GRT | 5,690 tons |
| Country |  British |
| Built | 1917 |
| Builder | W. Dobson & Co., Newcastle |
| Operator | Wm. Garthwaite, London |
| History |
U-boat attacks on Steamer Garthwaite
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 13 Dec 1917 | UB 22 (Karl Wacker) | Sunk | 4 miles E of Whitby | Tyne - New York | in ballast | 14 |
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