Medusa
| Name | Medusa |
| Type | Submarine |
| GRT | 245 tons |
| Country |  Italian |
| Built | 1911 |
| Builder | Fiat San Giorgio, La Spezia |
| Operator | Italian Navy |
| History |
U-boat attacks on Submarine Medusa
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 10 Jun 1915 | UB 15 (Heino von Heimburg) | Sunk | Torpedoed off Porto di Piave Vecchia, northern Adriatic | 14 |
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