The America's Cup was on display at the Greenwich Maritime Museum in London, as the Duchess met with supporters of Sir Ben Ainslie's bid to launch a British team to take part in the competition.
Olympic sailor Ben Ainslie is seeking to enter a British team in the 35th America's Cup, to be held in 2017.
The oldest trophy in sport was first offered as the One Hundred Pound Cup in 1851 for a race around the Isle of Wight, witnessed by Queen Victoria.
The first race was won by the schooner America, from New York, which beat a fleet of British boats sailing around the island.
American teams successfully defended all challenges for 132 years, until an Australian team won in 1983.
More top news
Firefighters were called to a cottage in Norfolk after a kitten was found trapped inside the engine bay of a Ford Focus.
Veteran singer Barry Manilow has recorded an entire album of duets with superstars - all of whom are dead.
David Cameron has been overheard saying the Queen "purred down the line" when he called to give her the result of the Scottish referendum.