Rules & Measurement 



All boats wishing to race and compete shall comply with the International Sunfish Class Rules.



The International Sunfish Class measurement and sail diagrams are also available.


Sail Number Information


Class Measurer

Racing of all classes of sailing boat under the Racing Rules of Sailing (RRS) and Equipment Rules of Sailing (ERS) is based on the assumption that each boat complies with its Class Rules, the Class Rules complementing the RRS-ERS by defining the boat and equipment that may be used. Normally it is necessary to measure the physical dimensions of a boat, its equipment and sails to establish if it complies with the Class Rules and this is the principal role of the “measurer”.


Measurers therefore play a fundamental role in the organization of sailboat racing, and their ability to apply the Class Rules correctly and accurately is essential. Equipment must be measured for certification before being used for racing, but it is normally inspected at events as well.


Sunfish Measurer:  John Butine   Email:   Phone: (330) 949-8881


Challenges & Interpretations to Class Rules

Any questions or challenges relating to ISCA Class Rules (Bylaw 1) should be forwarded to the Chief Measurer for interpretation along with detailed photographs and any comments or reasoning. The Chief Measurer will make an interpretation of all challenges, post interpretations to the Class website and communicate his interpretations to the Advisory Council. All such interpretations made by the Chief Measurer shall be binding until approved, rejected or modified by the World Council, duly published to the members of ISCA on the Class website.

The following challenges and interpretations to the Class Rules are currently active: