- Ajax 23 One Design Class Association
 - Official website for the one design class association of the racing keelboat designed by Oliver Lee. - Blaze Class Association
- Class association page with pictures, upcoming events, racing results, and tuning information.
- British 420 Class Association
- Includes racing information, technical resources, and more for sailing 420s.
- British Hobie Cat Class Association
- Includes training information, race results, a photo gallery, and upcoming events.
- British Moth Boat Association
- 11 foot one design single-handed dinghy which has a fully stayed rig.
- Contessa 32 Class Association
- Official site of the Contessa 32 Class Association. News, activities and information on Contessa 32 yachts.
- International Moth Class Association UK
- Offers racing reports, information, sailing tips, and pictures.
- Irish Sea Folkboat Association
- Members come from the East coast of Ireland, Wales, and the Northwest coast of England. Includes information on rallies, boats, and boat owners.
- Moody Owners Association
- Provides social, sailing, and other activities. Also promotes the exchange of ideas between the owners and suppliers of Moody yachts.
- National Solo Class Association
- Class association for the classic, one-design, single handed dinghy.
- Sigma 33
- Official site for the offshore one design class association.
- Sigma33.com
- Designed for Sigma 33 owners and crew by Sigma 33 owners and crew.
- Streaker Class Owners Association of the UK
- Includes information on Streaker kits, global events, rules and regulations, and boat gallery.
- U.S. Wayfarer Association
- National organisation to support the Wayfarer sailing dingy.
- UK 18ft Skiff Class Association
- Includes a history of the class, upcoming events, team information, and more.
- UK Dart 15 Association
- Includes information on clubs, racing, events, advice, and membership.
- UK Laser2 Class Association
- Official site containing results, classifieds, sailing tips, and open calendar.
- UK Mirror Class Association
- Includes training information, upcoming events, and photos.
- United Kingdom Wayfarer Association
- Class association devoted to racing and cruising the Wayfarer dingy in the UK.
- Yachting World Dayboat Association
- Association page with information on the classic 14-foot dayboat dinghy designed for cruising and racing.
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