Mario C.
| Name | Mario C. |
| Type | Sailing vessel |
| GRT | 398 tons |
| Country |  Italian |
| Built | 1869 |
| Builder | F. Rolla, Lerici |
| Operator | I. Villavecchia & G. Avversari, Genoa |
| History | Wooden barkentine |
U-boat attacks on Sailing vessel Mario C.
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 19 Jun 1916 | U 35 (Lothar von Arnauld de la Perière) | Sunk | 30 miles off Cap Cabaleria about 40°32’N, 3°45’E at 6:00am | 40.32N, 03.45E |
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