The IMOCA 60 - is a class of advanced monohull sailing yacht administered by the International Monohull Open Class Association. It is dominant in single and double handed ocean racing.
This class does not represent a fixed boat design and it allows any design provided it meets the class restrictions include the length (between 59 and 60 feet (18 m)) and maximum draft (4.5 metres (15 ft)). There are no explicit restrictions on beam, mast height or sail area.
This class is recognized by World Sailing.