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- IRC is a system of handicapping sailboats and yachts for the purpose of racing. It is managed by the Royal Ocean Racing Club (RORC) in the United Kingdom through their dedicated Rating Office, and the Union Nationale pour la Course au Large (UNCL) in France. IRC stands for International Rating Certificate. Originally, “IR” was an abbreviation for International Rule. However, since the Rule at that stage was not recognized under International Rule (sailing), that name was not permitted. So RORC simply decided to keep the initials as the name, and the name remained simply IRC until 2016. The IRC rule is not published, meaning the only bodies capable of calculating an IRC rating are the RORC Rating Office and UNCL Centre de Calcul in Paris (they are joint owners of the Rule). This prevents designers from attempting to design 'to the rule'. The earlier IOR was published, and often amended, resulting in widespread criticism for several reasons. Firstly, as the rule effectively dictated the nature of boat designs, amendments to the rule could result in older designs gaining less favourable ratings compared to their real world speed, making racing competitively more expensive. Also, the pressure to produce designs which performed well under the rule resulted in designers producing yachts with certain dimensions intentionally extreme, in order to gain an unfairly favourable rating. The production of yachts which were excessively light and beamy - what became the classic 'diamond' plan form of the IOR - was believed to impact safety, and was cited as a factor in the 1979 Fastnet race disaster. In theory, the IRC avoids these problems. IRC can apply a rating to any single or two-masted ballasted monohull yacht. It considers such features as asymmetric spinnakers, carbon masts, canting keels, and water ballast, all of which have been permitted for several years. Furthermore, the rule is reviewed annually in light of new developments and trends in past results. On this front, RORC and UNCL seek and actively welcome input and comment from the users. In recent years the Rule has since been developed to rate modern, light boats more fairly. IRC permits and encourages owner declared measurement and this policy will be maintained for the future, although some clubs and areas have always insisted that locally they should measure boats. There are also 'Endorsed' IRC ratings which require RORC or UNCL, as appropriate, to be satisfied as to the correctness of the rated data, generally by measurement by appointed measurers. Race Committees may require endorsed certificates for some events. Also, an IRC measurement manual is available on the IRC website https://ircrating.org along with simplified measurement guidance to assist with local measurement if required. Boat classes/models for which IRC Standards have been set in terms of LH, overhangs, empty weight, beam and draft measurements only. Upon applying for base ratings (non-endorsed), one may elect to have standard overhang dimensions and a class weight used towards their IRC Ratings. Racers then need to submit rig, sail, ... to complete the application process. These standard overhang and displacement values reference the lightest boat in class. IRC Rule and the information contained here is published with permission from the RORC Rating Office (Seahorse Rating Ltd). (en)
- La jauge IRC est une jauge de course internationale reconnue par World Sailing, Fédération internationale de voile, créée en 2000 à partir du Channel Handicap System, destinée au calcul du temps compensé par un handicap pour les courses de voiliers. L'IRC permet de faire courir ensemble et de manière équitable des bateaux de tailles et de conceptions différentes. Les règles et contrôles sont gérés notamment par le Royal Ocean Racing Club (Grande-Bretagne) et l'Union Nationale pour la Course au Large (France). IRC n'est pas un sigle. Les premières règles étaient désignées comme International Rules (IR), ou International Rule Club, mais n'ayant aucun point commun avec la jauge internationale et n'étant pas encore reconnues à l'époque par l'ISAF, le RORC a renommé les règles sans mention « international » avec le terme IRC. (fr)
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- IRC is a system of handicapping sailboats and yachts for the purpose of racing. It is managed by the Royal Ocean Racing Club (RORC) in the United Kingdom through their dedicated Rating Office, and the Union Nationale pour la Course au Large (UNCL) in France. IRC stands for International Rating Certificate. Originally, “IR” was an abbreviation for International Rule. However, since the Rule at that stage was not recognized under International Rule (sailing), that name was not permitted. So RORC simply decided to keep the initials as the name, and the name remained simply IRC until 2016. (en)
- La jauge IRC est une jauge de course internationale reconnue par World Sailing, Fédération internationale de voile, créée en 2000 à partir du Channel Handicap System, destinée au calcul du temps compensé par un handicap pour les courses de voiliers. L'IRC permet de faire courir ensemble et de manière équitable des bateaux de tailles et de conceptions différentes. Les règles et contrôles sont gérés notamment par le Royal Ocean Racing Club (Grande-Bretagne) et l'Union Nationale pour la Course au Large (France). (fr)
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