Irma
| Name | Irma |
| Type | Sailing vessel |
| GRT | 32 tons |
| Country |  French |
| Built | |
| Builder | |
| Operator | |
| History |
U-boat attacks on Sailing vessel Irma
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 29 Mar 1917 | UB 40 (Hans Howaldt) | Sunk | Cap Barfleur area |
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