Florence Louisa
| Name | Florence Louisa |
| Type | Sailing vessel |
| GRT | 115 tons |
| Country |  British |
| Built | 1876 |
| Builder | Gough, Bridgwater |
| Operator | Cornish Traders Ltd., Falmouth |
| History | Wooden schooner. |
U-boat attacks on Sailing vessel Florence Louisa
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 17 May 1917 | UB 40 (Hans Howaldt) | Sunk | Stopped and scuttled 8 miles off the Needles | Rouen - Briton Ferry | scrap steel | 0 |
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