Iser
| Name | Iser |
| Type | Steamer |
| GRT | 2,160 tons |
| Country |  British |
| Built | 1888 |
| Builder | C. S. Swan & Hunter, Newcastle |
| Operator | J. Mitchell & Sons, Dundee |
| History |
U-boat attacks on Steamer Iser
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 23 Feb 1917 | UC 17 (Ralph Wenninger) | Sunk | Torpedoed 14 miles NW of Belle Ile | 47.28N, 03.35W | Newport, Mon. - Rochefort | coal | 1 |
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