International C-Class Catamaran Championship

The International C-Class Catamaran Championship, (ICCCC or I4C), is a match racing sailing competition featuring the highly innovative International C-Class Catamarans, predominantly with a wingsail rather than conventional sail plan. It is the successor event to the International Catamaran Challenge Trophy, and like it, has always been colloquially known as the "little America's Cup", despite there being no actual connection to the America's Cup.

Source: Wikipedia — International C-Class Catamaran Championship (CC BY-SA 4.0)