Warren
| Name | Warren |
| Type | Steamer |
| GRT | 3,709 tons |
| Country |  British |
| Built | 1899 |
| Builder | W. Pickersgill & Sons, Sunderland |
| Operator | Warren SS. Co., Ltd. (A. D. Axarlis), London |
| History |
U-boat attacks on Steamer Warren
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 1 Apr 1917 | UC 38 (Alfred Klatt) | Sunk | 20 miles SW of Civitavecchia | 41.51N, 11.22E | Karachi - La Spezia | grain & general cargo | 3 |
| Master taken prisoner. | ||||||||
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