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.

The following measurers are ISAF International Measurers, which means they are appointed by ISAF and their role is to lead the inspection at the Class major events and also to measure new mould prototypes for approval:

Dimitris Dimou
80A Tainarou Str
Glyfada
Athens
GR 16561
GREECE

Email: dimou@deslab.ntua.gr
Tel: +30 210 961 0145     
Mobile: +30 693 288 7712         

Jurgen Cluytmans
Neerbroek 89
2070 Zwijndrecht
BELGIUM

Email: jurgen.cluytmans@telenet.be
Tel: +32 (0)3 252 65 56
Mobile: +32 (0)478 45 38 91

Kevin Farrar
240 Noank Road
Mystic
Connecticut 06355
USA

Email: farrar.sails@snet.net
Tel: +1 860 447 0382     
Fax: +1 860 439 0340
Mobile: +1 860 608 3383      

Alexander Finsterbusch
Quinquela Martin 69
1617 Lopez Camelo
Buenos Aires
ARGENTINA

Email: medicion@fibertel.com.ar
Tel: +54 3327 444853     
Mobile: +54 9 11 54729173      

Barry Johnson
100 Forrest Street
Cottesloe 6011
WESTERN AUSTRALIA

Email: barry_johnson66@optusnet.com.au
Tel: +618 9385 2098     
Fax: +618 9278 0587
Mobile: +618 411142221

Teresa Ríos Sánchez
Plaza Trafalgar 15, 14-1
Badalona 08913
Barcelona
SPAIN

Email: teresarios410@gmail.com
Tel: +34 639 147 534   

Haluk Suntay
Postane Mah Rauf Orbay Cad Bilge sok No 23
34940
Tuzla
Istanbul
TURKEY

Email: hsuntay@suntaydesign.com
Tel: +90 5324143267