The world's largest offshore race, the biennial Rolex Fastnet Race has been an established fixture on the ocean racing circuit since 1925. Organised by the Royal Ocean Racing Club, the 695-nautical mile race is a test of strategy and skill with challenging tidal currents and changeable weather. The fleet starts off the Royal Yacht Squadron in Cowes, races out of the Solent and across the often tempestuous Celtic Sea to the Fastnet Rock, before returning on a near reciprocal course to the finish line off Cherbourg-en-Cotentin, France.