- blakexpeditions@
- Cruising Association, The
 - Crewing service, yachting information, library service, social events, lectures, marina, and more. - Iroquois Owners Association
- Owners association with newsletters, sailing tips, and information on club rallies.
- Junior Offshore Group
- Calendar, results, and crew information for offshore racing.
- Old Gaffers Association
- For enthusiasts and sailors.
- Optimist Class Association (UK)
- Includes latest news, a calendar, photos, and more.
- Royal Yachting Association (RYA) (1)
- Sadler and Starlight Owners Association
- Owners association that arranges events, publishes a magazine, and coordinates publicity.
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