J Class (yacht)

The J Class of racing yachts (sometimes called "J-boats") were built to the specifications of Nathanael Herreshoff's Universal Rule. The J Class is considered the apex of the era when the Universal Rule determined eligibility in the America's Cup.

With boats costing $10-20 million to build and yearly upkeep around $3 million, J Class racing has been described as the "most expensive hobby on Earth".^[1]