An International Measurer (IM) appointment is made for a specific Class or Rating System. An IM can only be appointed to a maximum of three classes unless authorized otherwise by the Race Officials Committee.

The basic requirements for a candidate applying to become an IM are:

• a recommendation by the relevant Class Association or, for Rating Systems, by an ISAF Rating class and another IM.
• a candidate shall have acted as an Equipment Inspector in at least two prinicpal events of the class he is applying for
• attendance of an ISAF International Measurers Seminar within the last four years
• an intimate knowledge of the relevant class rules and the Equipment Rules of Sailing.

All candidates must ensure they have read the relevant Regulations in full in order to understand the complete qualifcations required to become and International Measurer.