This page contains a Flash digital edition of a book.
▲pplication f▲qs See also ‘Fair Play’ on page 41 and more FAQs on www.ircrating.org


What do IRC and TCC stand for? IRC stands for International Rating Certificate. IRC is one of only two international rating rules recognised by World Sailing. The TCC is the ‘rating’ or Time Corrector, the final C denotes IRC.


I live in the UK, but my boat is kept and raced overseas. Where


do I apply for a rating? Please apply through the IRC Rule Authority in the country where your boat predominantly races (Rule 8.13). They can also answer any IRC queries you have, or ask RORC or UNCL on your behalf.


Do I have to get my boat weighed and measured? What is an


Endorsed certificate? IRC is a self-measurement system, and if we hold standard hull data for the design, only rig and sail measurements need be supplied. However, some Rule Authorities or event organisers require boats to be weighed/measured for an Endorsed IRC certificate; this can be arranged through your Rule Authority. An Endorsed IRC certificate is one for which the rated data has been verified, by measurement or other methods. See ‘Acceptable Sources of Data’ below.


Is there anyone locally who can help me complete my


application? In many areas the local IRC measurer can also help you complete your application. In the UK there is a network of IRC Advocates, see http://tinyurl. com/ircadvocateuk.


I haven’t changed anything. Why do I have to revalidate and purchase a new certificate? I haven’t changed anything. Why has


my rating changed this year? All IRC certificates expire on 31 December of the year they are issued (30 May in Southern Hemisphere countries) because IRC is a ‘live’ rule – the maths behind the calculation of TCC is developed annually to reflect changes in design and sailing practice. The changes affect generic types and characteristics, not individual boats or designs.


Photo: RORC/Paul Wyeth


How many trial certificates can I apply for? You can run up to SIX trials per year to test potential changes. These are not valid for racing. You must hold a valid certificate, and see the limitations and conditions at http://tinyurl.com/irctrials.


Can I view another boat’s certificate online? We do not publish certificates online, but you can buy copy certificates. See http://tinyurl.com/ircopycert for limits and costs.


▲ccept▲ble sources of d▲t▲


IRC is a self-measurement system. There is no requirement to have your boat officially measured or weighed unless you want to, your IRC Rule Authority requires it, or you need an Endorsed certificate. Generally, acceptable sources of data are as follows:


Acceptable for: Linear measurements (hull/rig) Endorsed OR standard certificate


▲ Measurement by an official measurer ▲ Data from other, officially measured rating certificate for this boat


▲ One-design data for approved IRC one-design classes Linear measurements (sails)


▲ Measurements supplied by a World Sailing IHC sail loft unless prescribed otherwise by the IRC Rule Authority in a country


▲ Measurement by an authorised sail measurer Boat weight


▲ Weighing on an approved single-point load cell with a recent calibration certificate and verified by an official measurer


▲ Weight derived from other, officially measured rating certificate for this boat


▲ Weighing on approved compression load cells with a recent calibration certificate and verified by an official measurer


▲ One-design data for approved IRC one-design classes ▲ Light class standard weight for established production designs


NEVER acceptable


▲ Registered tonnage ▲ Weighing on built-in load cell of crane ▲ Weighing on loadcells on travel hoist


* Some basic data from a sales brochure is usually acceptable (eg. LH, Beam, Draft) but we reserve the right to use different data where we believe it to be more accurate.


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▲ Class standard weight or sistership weighed data where appropriate


▲ Weight derived from other rating certificate (Endorsement at the discretion of the Rule Authority)


▲ Weighing on weighbridge is usually accepted unless we believe it to be in error


▲ Designed weight, or derived from designed sailing displacement*


Standard certificate only


▲ Data from other rating or handicap certificate for this boat, not officially measured


▲ Owner or representative measurement ▲ Designer or builder data* ▲ Class standard hull data


▲ Data from other rating or handicap certificate for this boat, not officially measured


▲ Owner or representative measurement


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