Sir Ben Ainslie swaps Olympics for America's Cup
27 April 2013 Last updated at 11:19 BST
Sir Ben Ainslie has set his sights on winning one of the oldest trophies in sport - the America's Cup.
Great Britain has never won it despite the fact it all started on the Isle of Wight over 150 years ago.
Now Sir Ben is getting a team together to compete on the fastest boats in the world.
In the latest, America's Cup preliminary races, off the coast of Naples, in Italy, he had mixed fortunes beating his rivals on day one before slipping to 5th overall.
The BBC's Mike Bushell was given exclusive access on board.