Ioanna No. 37
| Name | Ioanna No. 37 |
| Type | Sailing vessel |
| GRT | 17 tons |
| Country |  British |
| Built | |
| Builder | |
| Operator | |
| History |
U-boat attacks on Sailing vessel Ioanna No. 37
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 15 Sep 1918 | U 65 (Gustav Sieß) | Sunk | Mediterranean |
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