S. Anna S.
| Name | S. Anna S. |
| Type | Sailing vessel |
| GRT | 41 tons |
| Country |  Italian |
| Built | 1899 |
| Builder | ???, Torre del Greco |
| Operator | Mangiapanelli Salvatore, Trapani |
| History | Wooden schooner. |
U-boat attacks on Sailing vessel S. Anna S.
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 3 Mar 1917 | U 39 (Walter Forstmann) | Sunk | Stopped and sunk by gunnery in the Straits of Sicily | 37° 05'N, 11° 57'E |
Position of attack on S. Anna S.
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