Small Catamaran Handicap Rating System

Welcome to the International Small Catamaran Handicap Rating System (SCHRS)

The ISAF Small Catamaran Handicap Rating System, SCHRS, has evolved over a number of years, initially from a basic rating system used in the USA from the 1960's, which the French Federation de Voile modified to become what was known in Europe as the French Catamaran Rating System in the eighties. The French have always been one of driving forces in Racing Catamarans, and they included a method of rating foils in their system.

Around 1990 the then IYRU decided that as the World Authority, they should have their own system for Rating Small Catamarans. A Working Party was formed, and they examined various options. The main contenders at the time were the FFV System the Dutch Texel Rating System, which was another measurement based system, and which evolved in the early eighties as a result of a need to deal with the escalating number of entrants in the annual Round Texel Race.

Both systems produce rating numbers which are remarkably close in many cases, but at the time it was thought that the ability to rate foils was important and the system chosen for what is now the ISAF SCHRS evolved from the French Rating System.

Whilst it is accepted that the ideal Rating system is one which uses historical results, a Portsmouth Yardstick type system, it has proved difficult to obtain sufficient data to validate such a system around the World. The SCHRS enables new designs to be rated quickly, and allows International regattas to take place with a common handicapping system for many types of Catamaran.

The purpose of these regulations are to enable trampoline multihulls of various types to race together on a comparative basis, and to protect the interests of the owners in keeping development under control without hindering further research.

It is recognized that one-design and level rating are generally a more realistic test of sailing skill. For events organised under these regulations, organizing authorities may consider separate arrangements for one-design or level rating classes present in sufficient numbers.

Rating change History

  • April 2009 Spitfire update and addition of Spitfire S
  • September 2008 Topaz range ratings added
  • August 2008 Stealth R Single handed rating confirmed
  • July 2008 White Formula F20 rating confirmed
  • June 2008 Weta range ratings added
  • April-May 2008 Major update of Beam and Trapeze data plus addition of Weta
  • October 2007 Confirmation of F16's CM and VLM, new class Javelin 2 (X2)
  • September 2007 Confirmation of various Hobie boat weights
  • 1st March 2007 Addition of Beam and Crew using trapeze Class datas
  • 28th January 2004 Removal of CMP from formula and ratings
  • 28th January 2004 Removal of CMP from formula and ratings
  • 28th January 2004 Removal of Ventilo 18 and Ventilo Quickie
  • 28th January 2004 Addition of Ventilos 18HT, 20CB, 609 and Zippo
  • 28th June 2003 Addition of Stingray 5.5
  • 28th April 2003 Addition of CMP, provisional ratings
  • 18th November 2002 Addition of Formula 16 and Formula 16 Cat Boat
  • 27th June 2002 Shadow rating comfirmed prior to UK East Coast Piers Race

Additional Resources

Contacts

  • Chairperson:
  • Technical:
  • ISAF representative:
  • Web site:

Reference

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