Cruisers are many at the Yacht Club de Cannes. they are all sailing vessels, space, not monotypes. Obviously, during races, a great disparity appears between the size of ships, time and different design. In order to make consistent classification and, in principle, equitable among these boats, disability standards were put in place.



To predict the performance of shells (instead of the brakes) propelled by sails (rather motors), schools of specialists have published formulas designed to take into account the different capacities of boats.

Quick flashback :

In the 60s, the gauge used in England and France called RORC gauge as the English club who holds.
Architects do their job and gradually find a way “to go faster boats” without the gauge can take it into account. At least until the next evolution of the rule.
Aware of the necessary improvements, international authorities set up in the early 70s, the International Offshore Rule, the IOR.
After starting or “everyone gets off” on boats separated into classes of related ratings, practice IOR is moving towards the same ratings boats groupings, called Ton Cup and the boats were mostly “tonners.” (Two, One, Half, Quarter and even Minitonners.)
The story is then repeated and the progress of naval architecture highlight the limits of the rule. New become significantly faster, rating equal to, than older models. The ‘allegiances age “are doing nothing: they are too weak for old and impossible to raise without discouraging innovation.
The IOR does not manage to balance the opportunities for all small boats. No chance to non boats designed for the gauge.
In France and abroad, associations are developing a “table made of time” perfecting the observation of the performance of standard models.
While the IOR has become a matter of prototypes, coastal cruisers are organized to accommodate discouraged series boats and become National Handicap.
The table published in the handicaps FFV review of 1977 only about 146 models. The largest is 9 meters, which is sufficient for the fleet at the time.
In 1982 appeared the first HN guide, it processes 350 types of boats all have a lower handicap group 20 … Speed later recognized for the First class 8 !

Elsewhere in the world 
Performance in finding the solutions are developed across each country. They represent 60 000 yachts park, next to the 15,000 who use performance solutions forecasting gauges (IMS or other less developed). Within ISAF formula HN France is renowned for its quality criteria, along with the LYS systems (for Norway and Sweden) and PHRF system (for the USA). This set represents a fleet of over 26 000 vessels among the 60,000.
The IOR outdated, a mix of English clubs Franco launches its debris from 84 a “simple secret” gauge for not being “stale or diverted,” later renamed the CHS IRC.
In 1989, Bateaux magazine, comparing the gauges in place in France counted 5,000 practitioners and 370 HN CHS.
The Offshore Racing Council to address the shortcomings of the IOR, is developing the International Measurement System (IMS).
This method provides the behavior of each boat speed for each wind speed. The famous polar speed.

Advantage : a boat is completely “pre-calculated”. We can give him the adjusted coefficients in the wind.

Disadvantage, the process seems so cumbersome to use, and detailed measurement, expensive to implement.

The ORC International (new name of the IMS) is currently in place for the competitions of very good level. This is the formula interseries of “high technology”, admitted for the world championships. The only.
From 98 ORC Club appears. This is a simplified version to the public vocation. The hull forms – essential for assessing resistance forces – are pooled between similar boats. They are reused from one boat to the other and test sockets are lower. The ratings can be tailored to the types of courses. A valuable and useful improvement … but not always implemented …
Taking into account a large number of parameters, the Orc club is the most accurate forecast gauge for consumer racing. Especially in the case where one wishes that the coefficients are automatically adapted to the types of courses.
The forecast by the orc overlap to a realistic range of actual performance measurements made by the formula HN France. The latter which is based on standards, keeps the great advantage of flexibility. Both solutions, managed in France by the French Sailing Federation, who grew up separately, are actually complementary. From this year they are pooling their expertise. boat types are still registered on reference tables. New models and too different boats of their standard will be reviewed by a cross-scale approach ORC / HN experience.

This is a further step: combining the experience of a performance system, with the quality of a Predicted system.

To know more :

The website of French Sailing Federation, and that of the Sailing League of the French Riviera