Devonian
| Name | Devonian |
| Type | Passenger steamer |
| GRT | 10,435 tons (one of the largest ships hit) |
| Country |  British |
| Built | 1900 |
| Builder | Harland & Wolff, Ltd., Belfast |
| Operator | F. Leyland & Co., Ltd., Liverpool |
| History |
U-boat attacks on Passenger steamer Devonian
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 21 Aug 1917 | U 53 (Hans Rose) | Sunk | 20 miles NE of Tory Island | Liverpool - Boston | general cargo | 2 |
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