What is ORC?
ORC Rating Systems use science and technology to develop its handicap systems. With a complete set of measurement of the hull with appendages, propeller, stability, rig and sails, it is then possible to use computer software called a VPP – for Velocity Prediction Program – to calculate the theoretical speeds for the boat in various wind conditions. With this powerful tool, that is updated yearly by a panel of experts in aero and hydrodynamic science, the ORC rating system can tell you the performance differences between different boats in different wind conditions and course geometries.
ORC International is accurate and ORC Club is simple
ORC Rating Systems are administered by the National Rating Offices established worldwide in each country that has active offshore rating.
There are two forms of the rating systems that are fully compatible using the same measurements and the same VPP: ORC International (ORCi) and ORC Club.
ORCi is based on a complete boat measurement as defined by the International Measurement System (IMS). ORC Club uses the same data, but it may be accepted as being declared by the owner or obtained from any other source, including photos, drawings, designs or data from identical or similar boats.
In use, ORCi is a complete measurement rule and it is applied in all countries at the same level, while ORC Club is administered locally where each country may decide the level of measurement needed and even translate the complete certificate into the local language. ORCi is intended for use on World, Continental, Regional and National level as well as major international offshore races, while ORC Club is as its name implies designed for Club-level racing that can go up to national championship level. Both systems having the same rating and scoring options and can be scored together in any races.
- 2018 RULES IMPROVEMENTS: Summary of changes
- ORC Rating System 2018 - v 1.01 ORC International & ORC Club
Of course, due to better quality of measurement data, ORCi certificates will be more accurate and give more favorable ratings. Because the systems are so compatible, it is very easy for owner who has an ORC Club certificate to upgrade to ORCi – just contact your local measurer or rating authority.