ORC Club

General description


ORC Club is a simplified rating system which uses the same ORC Velocity Prediction Program (VPP) as ORC International and the same data structure of the International Measurement System (IMS). ORC Club handicaps are compatible with ORC International for scoring races, and ORC Club and ORC International-rated boats may be scored together in the same race, but ORC Club may also be administered as a stand-alone system.

As the name implies, ORC Club is an economical, simplified handicapping system intended mainly for racing at the club or area level. The measurement input used to produce Club certificates is not as rigorously controlled as that needed for IMS (ORC International?). It is important that owners and administrators understand Club’s objectives, how it achieves these, what Club’s limitations are and what compromises have been made and why. Owners are responsible for doing their best to supply correct input information and for asking their Rating Office or local measurer for assistance when in doubt.

The power of the VPP enables ORC Club to calculate a yacht's theoretical speeds for different wind directions and strengths, making it possible to rate the same boat differently in light and heavy winds. From the owners’ and race administrators’ perspective, ORC Club is considerably simplified relative to IMS. It is on a par in this regard with other simplified systems, but does not sacrifice the rating accuracy that is made possible with VPP handicapping. It also offers the Rating Authority and/or race organiser with scoring flexibility that is not available with other simplified systems. And ORC Club scoring can be done with a hand calculator if desired.

By definition, an ORC Club certificate is produced on the basis of some combination of “measured” and “constructed” measurement input. Minimum measurement inputs may be declared by the owner which eliminates any measurement costs, but may also be recorded by an official measurer. Once the required inputs have been entered and the constructed inputs have been generated by the rating program, the combined set of data will be processed by the VPP in the same way as for IMS (ORC Interantional?) processing and an ORC Club certificate is created. This is possible by using a very large database of all measured boats worldwide. There are thousands of types of boats on ORC Standard Hull list, but also one-offs or non-standard yachts may be calculated by defining hull lines from drawings, picture or other available documents. This is done by the ORC or by the local Rating offices and almost every boat can be rated for ORC Club.

The ORC Club certificate can be obtained very easily: just fill out an on-line application form. The data will then be processed to the relevant rating office and certificate can be issued in a very short time.
 

Administration


The sole authority for ORC Club is the ORC and the Rule shall be maintained and administered at ORC discretion, including, inter alia, periodic rule and formula changes, rule interpretations, designation of Rating Authorities and specification of input data used to produce certificates, whether for a specific yacht or yachts or for yachts in general. Valid ORC Club certificates may be issued only by the ORC and by rating authorities so authorized by the ORC.

ORC Club ratings may change due to annual revisions to formulations in the VPP. Ratings may also change due to refinement of default measurement calculations and/or additions to and refinements in the analysis of the world database on which certain default values are based, including changes in assignment of hull offset files to yachts for which there are no full hull measurements.


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