Irthington
| Name | Irthington |
| Type | Steamer |
| GRT | 2,845 tons |
| Country |  British |
| Built | 1897 |
| Builder | J. L. Thompson & Sons, Ltd., Sunderland |
| Operator | SS. Irthington Co., Ltd. (Maclay & McIntyre), Glasgow |
| History |
U-boat attacks on Steamer Irthington
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 23 Sep 1917 | UC 53 (Kurt Albrecht) | Sunk | 3 miles ENE of Cape Vaticano, Gulf of Gioja | 40.35N, 15.01E | Naples - Messina | in ballast | 0 |
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