Cardiff
| Name | Cardiff |
| Type | Steamer |
| GRT | 2,808 tons |
| Country |  British |
| Built | 1898 |
| Builder | W. Gray & Co., Ltd., West Hartlepoo |
| Operator | R. W. J. Sutherland & Sons, Cardiff |
| History |
U-boat attacks on Steamer Cardiff
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 10 Jan 1918 | U 84 (Walter Roehr) | Damaged | Torpedoed 20 miles SW of Lorient. | Cardiff & Brest - St. Nazaire | coal | 8 | |
| Beached but later refloated. | ||||||||
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