The UK Dart 15 Association supports sailors of the Dart 15, also known as the Sprint 15, a fifteen-foot one-design catamaran sailed by one or two crew. The boat can be configured with a mainsail alone or with a mainsail and jib; Sport Mode is sailed single-handed with a mainsail, jib and trapeze. Designed for practical ownership, it can be transported on a trailer or car roof and rebuilt ready to sail in under an hour without tools.

The Association brings together Dart 15 sailors and clubs across Britain, sharing information, news, photographs, videos and sailing guidance. It publishes boat manuals, class rules, tips and a magazine, and provides a forum and buy-and-sell listings. Members and prospective sailors can find local clubs, contact the Association, or ask about trying a Dart 15.

Each year, the Association organises summer and winter series and two national championships, including events for different sailing configurations. Its website provides event calendars, race reports, notices and results, helping competitors stay informed and connected with the class.