Small Catamaran Handicap Rating System

April 2009

New Spitfire rating, and addition of the Spitfire S. The Spitfire association have had the original Spitfire re-measured under the new rules as a number of things have changed over the years and the boat had not been re-measured; principally the addition of a Spi chute and re-cutting of the Jib; have resulted in a Spitfire rating change. At the same time, the new Spitfire S has been added to the range

July 2008

The White Formula 20 was measured prior to the East Coast Piers Race, we now have a copy of this measurement certificate, the rating has now been added to the site.

June 2008

We are pleased to announce a trial rating for the Weta 4.4 trimaran. We have used the SCHRS model to calculate a trial rating and to see if it is suitable for rating small trimarans. As this is a trail rating, we reserve the right do change it at any time should we see fit. We suggest clubs check the site before producing final results. We suggest clubs may treat the Weta 4.4 in the same way as a "non production boat" as per The System B.1.

April-May 2008

Further to the clarification of many beam and trapeze Data the majoity of ratings have been revalidated updated to reflect complete data points.

• New boats have been added to the following classes: AHPC Taipan, AHPC Viper, Bimare, Capricorn, Cirrus, Diam 3, Drake, Hobie, Javelin, Mattia, Mystere, Nacra, Prindle, SL, Spitfire Quiberon, Topcat, Topkat, Ventilo
• The Weta class has been added, please note these are trial ratings.

October 2007

Further to the confirmation of information for Foumula 16, both single handed and two up as follows:

• Formulae 16 revised CM of 15, VLM of 8.1 adjusts rating to 1.008
• Formulae 16 Cat Boat revised CM of 15, VLM of 8.1 adjusts rating to 0.982
• Addition of new Class Javelin 2 (X2) (Non 18HT)
• Addition of number to the FAQ's for ease of reference

September 2007

Further to the confirmation the weights of a number of Hobie class boats, we have updated the ratings details as follows:

• Hobie 16 revised weight of 145.15 adjusts rating to 1.152
• Hobie 16 Spi revised weight of 145.15 adjusts rating to 1.113
• Hobie 17 revised weight of 149.7, rating unchanged
• Hobie FX1 Cat boat revised weight of 148.5 adjusts rating to 1.036
• Hobie FX1 double revised weight of 148.5 adjusts rating to 1.035
• H18 revised weight of 181.14 adjusts rating to 1.061
• H18 SX revised weight of 206.4 adjusts rating to 1.084
• H20 Formula revised weight of 190.5 adjusts rating to 1.018

March 2007

It gives me great pleasure to announce that the revisions to the ISAF Small Catamaran Handicap Rating System (SCHRS) have been uploaded to the SCHRS website.

We have also calculated a selection of ratings for the boats that we believe we had have a complete set of ratings points for.

If your boat is listed without a rating, we should indicate on the list the rating point we are missing. Please send that to .

We are also putting the final polish to a utility that will allow you to calculate the expected rating for a given set of rating points; this is yet to be uploaded to the website, but will be available soon, I will advise when this has been uploaded.

We have also collated a list of Frequently asked questions.

I would like to thank all the members of the SCHRS Rule Management Group for there assistance in formulating the new ruleset:

• Simon Longstaff – Chairperson, U.K.
• Olivier Bovyn - ISAF Rep., France
• Colin Whitehead – Member, South Africa
• Olly Harris - Technical, U.K.
• Jason Smithwick - ISAF Rep. and Technical, U.K.
• David Chivers - Measurer
• Simon Forbes - ISAF Staff
• Geoff Balfré - Web Site

January 2007

Formation of the SCHRS Rule management group January 2007

As people may be aware, a number of people have been reviewing the SCHRS rule. Jason Smithwick, ISAF committee member, recently attended the ISAF Annual meetings in Finland and at these meetings it was recognised that an International SCHRS "Rule Management Group" should be formed.

This group reports to the chair of the ISAF equipment committee and while informal at present, it will be ratified by ISAF council at the next annual meeting in 2007. This group is formed thus:

• Simon Longstaff – Chairperson, U.K.
• Olivier Bovyn - ISAF Rep., France
• Colin Whitehead – Member, South Africa
• Olly Harris - Technical, U.K.
• Jason Smithwick - ISAF Rep. and Technical, U.K.
• David Chivers - Measurer
• Simon Forbes - ISAF Staff
• TBA - Other mainland European representative
• TBA - Other U.S./ Australasian
• Geoff Balfré - Web Site

This group will be charged with the day-to-day running, administration, application and development of the ISAF SCHRS rule. The group have made good progress on an initial set of amendments and are continuing to work on revisions to the rule. The group are planning to have these complete and ready for submission to ISAF in time for adoption by early spring 2007.