The Windsurfing World Championships (now the RS: X World Championship) is an international sailing competition organized by the ISAF (International Sailing Federation), held since 1980, now annually.
Editions
From 1986 to 1992 they played two different editions of World Windsurfing Championships, as well as in 2006 (blue and yellow in the table).
References
Windsurfing World Championships Wikipedia(Text) CC BY-SA