Diomed
| Name | Diomed |
| Type | Steamer |
| GRT | 7,523 tons |
| Country |  British |
| Built | 1917 |
| Builder | Scotts’ SB. & Eng. Co., Ltd., Greenock |
| Operator | Ocean Steam Ship Co., Ltd. (A. Holt & Co.), Liverpool |
| History |
U-boat attacks on Steamer Diomed
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 21 Aug 1918 | U 140 (Waldemar Kophamel) | Sunk | 195 miles ESE of Nantucket | Liverpool - New York | in ballast | 2 |
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