International Radio Sailing Association
Encyclopedia
The International Radio Sailing Association formerly the ISAF Radio Sailing Division is an affiliate member of the International Sailing Federation
International Sailing Federation
The International Sailing Federation is recognised by the International Olympic Committee as the world governing body for the sport of sailing....

 It is authorised to conduct up to three official World Championships each year.

Classes

There are four international classes of radio sailing boats recognized as follows from the smallest to largest:
  • International One Metre
    International One Metre (radiosailing)
    The International One Metre is a class of Radio Sailing Boat used for racing under the International Sailing Federation Racing Rules of Sailing. It is a measurement-controlled box rule originally created by the ISAF-RSD in 1988 in an attempt to harmonise the various one metre rules created around...


The IOM class rules specify a monohull of maximum length 1000 mm, with maximum draught 420 mm. There is a minimum weight of 4000 g, which makes homebuilding of competitive boats possible. The IOM has three one-design rigs. To keep costs down, hull materials are restricted to either wood or glassfiber, while masts and booms are restricted to either aluminium or wood.
  • International Marblehead
    International Marblehead (radiosailing)
    The International Marblehead is a class of radio controlled sailing yacht used for competitive racing. It is a measurement controlled classes administered by the International Radio Sailing Association. The classes link with IRSA entitles the class to hold World Championships official recognised...


A Marblehead has a maximum length of 1290 mm and a maximum draught of ca 700 mm, but no minimum displacement. Up to six rigs are allowed, the tallest being about
  • International Ten Rater
  • International A Class
    International A Class (radiosailing)
    The International Radio A Class is a class of radio controlled sailing yacht used for competitive racing. It is a measurement controlled classes administered by the International Radio Sailing Association. The classes link with IRSA entitles the class to hold World Championships official...


History

At the I.M.Y.R.U. General Meeting at Dunkerque in 1982, it was resolved to adopt the IYRR and IYRU Measurement Instructions and to follow the IYRU Constitution and Regulations as closely as possible. For the next eight years a lot of very hard work was done by the I.M.Y.R.U., particularly by its then Chairman, Norman Hatfield, to get Model Yachting accepted into membership of the full-size governing body, the International Yacht Racing Union (IYRU). This work culminated on 1st May, 1990 when the I.M.Y.R.U. became the Model Yacht Racing Division of the IYRU (IYRU - MYRD). In its turn, in August, 1996, the IYRU changed its name to the International Sailing Federation
International Sailing Federation
The International Sailing Federation is recognised by the International Olympic Committee as the world governing body for the sport of sailing....

 (ISAF) and became the ISAF Radio Sailing Division (RSD). In 2009 the Division changes it name at the International Sailing Federation
International Sailing Federation
The International Sailing Federation is recognised by the International Olympic Committee as the world governing body for the sport of sailing....

to International Radio Sailing Association to make it clear that it was an independent body not a part of ISAF. However the two organisation carry on with the close link.
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