Leonatus
| Name | Leonatus |
| Type | Steamer |
| GRT | 2,099 tons |
| Country |  British |
| Built | 1903 |
| Builder | Richardson, Duck & Co., Stockton |
| Operator | Crossburn SS. Co., Ltd. (Clark & Service), Glasgow |
| History |
U-boat attacks on Steamer Leonatus
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 12 Dec 1917 | UC 40 (Hermann Menzel) | Sunk | Torpedoed 2 miles ExS of the Kirkabister LH, Shetlands | Swansea - Lerwick | coal | 0 |
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