Class Rules



Class Rules


The Windsurfer sailboard was designed to be simple to sail and race with emphasis on basic sailing skills. The objects of Windsurfer Class Rules are:
(1) To keep each boat as equal as possible by RIGIDLY maintaining, without deviation, the one-design features of the Windsurfer for class racing,
(2) To minimize cost and trouble to each competitor,
(3) To encourage the use of racing tactics and sailing skills rather than equipment to increase boat speed.


The Windsurfer sailboard is an international one-design class boat. Except for alterations or additions which are specifically permitted by these rules, the Windsurfer shall be raced in the condition in which it is supplied by the manufacturer or his agents. Any alteration to the Windsurfer is prohibited. Where a repair is permitted, it shall be carried out in such a way that the original shape characteristics of the repaired item and the boat as a whole are unchanged.


The manufacturer guarantees that all unmodified Windsurfer sailboards are legal for class racing. Every purchaser of a Windsurfer is assured of a completely competitive boat without the need to purchase any additional gear.



1. A damaged daggerboard well or skeg box may be repaired.
2. Tape may be placed inside the dagger-board well to improve the fit of the dagger-board in the trunk.
3. The bottom and deck surface of the hull may be rubbed down using abrasive material.
4. The deck surface of the hull may be painted or waxed.
5. The scoop and rocker of the board may be altered.
6. A damaged skeg may be repaired.
7. Footstraps may be added.


1. A damaged daggerboard may be repaired.
2. After January 1, 1981, only stock plastic daggerboards shall be used for racing.


1. The bottom 30 centimeters and the top 15 centimeters of the mast may be repaired.
2. The joints between the mast and the mast tip and mast base may be sealed with tape.
3. The fit of the mast tee into the hull may be adjusted.


1. Teak booms may be sanded, filed, or refinished with teak oil or equivalent.
2. Non-slip surfaces on the boom which do not increase boom stiffness are permitted.
3. A separate line may be used for the sole purpose of tying the aft teak boom ends together.


1. Tell tales may be added as desired.
2. A damaged sail may be repaired.


1. A line may be altered or replaced provided that the line is used for the same purpose as the stock line.
2. A safety line between the hull and the mast is permitted.
3. The uphaul line may be attached to the mast tee directly or by using an extra line. Elasticity of these lines is optional.
4. One length of line may be secured to each boom for the sole purpose of supporting a harness. The two points of attachment on each boom may be no more than 150 centimeters apart.


The race committee, an official class measurer, a competitor and an officer of the IWCA have the right to protest sailboard which does not conform to these rules.

Should a protest be lodged for violation of  these rules, then the race committee shall resolve the protest by the following procedure:

1. An official class measurer, or in his absence a measurer appointed by the race committee, shall inspect the Windsurfer under protest to see if an illegal alteration has been made.

2. If doubt remains after step 1, then the measurer shall take a random sample of 10 boats and compare the Windsurfer under protest with the sample. If the result of measurement of the Windsurfer is within the range of measurements of the sample, the protest shall be disallowed. If the result of measurement of the Windsurfer is outside the range of measurements of the sample, and:

a. If the result of the measurement provides conclusive evidence of an illegal alteration, the Windsurfer shall be disqualified. or

b. If the result of measurement does not provide conclusive evidence of an illegal alteration, full details of the protest and of the measurements shall be forwarded to the IWCA Chief Measurer for a decision. If replacement parts are available for use on loan, the race committee may require the protestee to use a replacement part for the remainder of the series.

If any of the comparisons made during the sampling are considered to be unusual or noteworthy, then this information shall be referred to the IWCA Chief Measurer.

Unless the decisions of the race committee are final, a protestee who has been disqualified under these rules may appeal to the IWCA Chief Measurer.


1. Only one hull, mast, boom, daggerboard and sail may be used in a regatta or race series unless approval of the race committee is obtained.
2. An anchor is not required to be carried.
3. A towline may be carried.
4. Only current IWCA members are permitted to race.
5. Any harness used must have a quick release device operable using one hand only.