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post #5963 of Old 02-02-2014 Thread Starter
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ORC and rating systems.

Originally Posted by robelz View Post
Something about X-Yachts: Had a nice chat at the BOOT with a Danish salesman. Asking him about the XP33's performance he said: In fact it was built for IRC but there wasn't any major success in 2013. In ORCi instead it was pretty good...

Nice for those who are looking for an ORCi racer but a hard verdict for Jeppersen...
That's all about the nonsense regarding rating formulas. For being good in IRC the boat had to be worse than it is (slower), I mean they had to put one of those stupid keels without a torpedo and diminish the RM of the boat. There are specialists in that, I mean tailoring boats for rating formulas but that does not mean they make very good boats, only boats that can beat the formula.

That is particularly stupid with IRS since the formula is a secret one, not like the ORC that is an open one. I hope that in a near future they finish of having the nonsense of having two major ratting systems and unify them.

Meanwhile I find the ORC a much better rating system adapting more the rating to the true performance of the boat and allowing for different ratings in different sea and wind conditions. It allows also a lot more variety in what regards the type of boats that will be able to win, in what regards hull shape and type of boat and has less influence in boat design than the IRC.

Don't believe me, believe Jason Ker:

It is not by accident that some of the best racing Nas have been contributing to the perfection of ORC that I think they see as the one that deserves to be improved.

ORC has a technical committee (ITC) that are the ones that are in charge of adapting each year the rule to make it more true to each boat real performances:

The ITC is composed of nine members and two research associates who are naval architects, measurers, marine engineers and experts in aero and hydrodynamics, and who annually pursue a research agenda to update and improve the Velocity Prediction Program (VPP) used by ORC. This VPP forms the basis for ORC to provide ORC International (ORCi) and ORC Club handicap ratings for over 9000 boats around the world that race using ORC rating systems, and is used at the annual ORCi World Championship, the official ISAF offshore World Championship event.

It is not a big committee and among them they have Jim Schmicker from Farr Yacht design and Jason Ker.

The ORC appears as a perfection of the IMS, based on a more scientific approach. In fact IMS was created by ORC and is still used (in ORC and other rating) as a measurement system. The ORC uses a much improved and complex VPP. The ORC was born in 1969 to create a unique international handicap standard from all pre-existing rating systems. Well, they are still trying

The ORC championships have been increasing in number and participation and they are very important in the Med and in the Baltic. There are actually ORC championships in Italy, Germany, Russia, swede, Finland, Norway, Netherlands, Lithuania, Estonia, Austria, Portugal, Spain, Greece, Croatia, Ecuador, Brazil, Argentina and Korea. Also a Mediterranean and a Central European championship as well as each year a World Championship and a European championship (at a single location and for about a week each).

As you can see the big hole in the picture are the French and the British that stick to IRC as well as the Americans that go mostly with a local rating system (PHRF).

Too technical to post about it here but if you, or anybody wants to know more about it (and it is very interesting) you can look at a ORCI certificate and look at the explanation about all those numbers in their site, a very good and dynamic one:

ORC - World Leader in Rating Technology

ORC - World Leader in Rating Technology



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Last edited by PCP; 02-02-2014 at 01:17 PM.
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