The expectant royal, 32, is reaching out to young adults to promote sailing as the royal patron of the 1851 Trust, which is supported by the British America's Cup team.
"I feel very fortunate to have enjoyed sailing from a young age," she said in a statement, "and I know it is a great way of providing young people with the opportunity to develop skills and confidence."
The charity gets its name from the date when the America's Cup trophy left the U.K. shores in 1851. Britain has never won the cup, but the new effort, spearheaded by Olympian Sir Ben Ainslie, was launched with the Duchess of Cambridge's help in the summer.
Kate was set to visit the base for Ainslie's team on Monday, but her appearance – though never announced – was canceled because of her ongoing health concerns.
She has been resting at her parents' home as she continues to fight severe pregnancy illness.
"I am looking forward to being part of this journey," her statement continued, "and I hope that through the 1851 Trust we can engage and inspire a new generation into sailing along the way."
The adoption of the 1851 Trust is her ninth formal association. (She has seven other patronages and also volunteers with the Scout Association.)
Kate hopes to return to her royal duties publicly on Oct. 21, when she is to support Queen Elizabeth at the president of Singapore's state visit to the U.K. with his wife.