Istrar
| Name | Istrar |
| Type | Steamer |
| GRT | 4,582 tons |
| Country |  British |
| Built | 1896 |
| Builder | Harland & Wolff, Ltd., Belfast |
| Operator | T. & J. Brocklebank, Ltd., Liverpool |
| History |
U-boat attacks on Steamer Istrar
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 2 Dec 1916 | U 39 (Walter Forstmann) | Sunk | 120 miles NNW1/2W of Alexandria | 33.15N, 28.20E | Birkenhead - Calcutta | coal & general cargo | 1 |
| Chief engineer taken prisoner. | ||||||||
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