Luis
| Name | Luis |
| Type | Steamer |
| GRT | 4,284 tons |
| Country |  British |
| Built | 1916 |
| Builder | W. Gray & Co., Ltd., West Hartlepool |
| Operator | C. Nielsen & Sons, Hartlepool |
| History |
U-boat attacks on Steamer Luis
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 12 Apr 1918 | UC 71 (Walter Warzecha) | Sunk | Torpedoed 3.5 miles SSE of St Catherine’s Point | St. John, N.B. - Portsmouth | 4 |
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