Ranger was a J-class racing yacht that successfully defended the 1937 America's Cup, defeating the British challenger Endeavour II 4–0 at Newport, Rhode Island.

[3] Ranger was constructed according to the Universal Rule that constrained the various dimensions of racing yachts, such as sail area and length.

Often referred to as the "super J",[4] Ranger received a rating of 76, the maximum allowed while still adhering to the Universal Rule.

Construction of a replica of Ranger was started at Danish Yacht Boatyard (by Royal Denship) in early 2002 and was completed in late December 2003.

[6] The original designs were used as the basis for the new boat but were updated to conform to the latest safety regulations and the requirement of the owner to cross oceans in comfort.