Poincare
| Name | Poincare |
| Type | Sailing vessel |
| GRT | 35 tons |
| Country |  Tunesian |
| Built | |
| Builder | |
| Operator | |
| History |
U-boat attacks on Sailing vessel Poincare
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 12 Jun 1918 | UC 20 (Heinrich Kukat) | Sunk | W of Malta |
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