"The Techno 293 Class is devoted to fostering the development of windsurf racing for competitors under the age of 17 years old around the world through the promotion of an inexpensive racing format."
Resources
Books
The Tricktionary is a comprehensive training book of 200 pages which shows from the basics of windsurfing up to all kinds of freestyle manoeuvres everything you need to learn this amazing sport or to improve your skills. http://www.tricktionary.net/