Mark,

SCHRS can produce a rating for any boat where the data points are Documented, please see section C.2

In order to produce ratings for classes like the F16 and F18, we can produce a rating for the class as the class rules control most or all of the data points, we can simply take the max and min values that make for the fastest boat. For SMODS, all boats should be the same (and the class rules state this) so again, we can, one a boat has been measured, produce a rating for the class.

There are however problems when a class rule set does not control all the data points that we need, and those that are not controlled can have an ever expanding effect on rating. The A class is a classic example as this class does not control the luff length of the mainsail; because of this we CANNOT provide a blanket rating for the class as it would be infinity as the luff length is not controlled; for the A class, ALL boats need to have a SCHRS measurement certificate. Please see Section D.


For experimental boats, or boats where there is no class rules, then each boat needs to be measured: See sections B.1 and B.1.2.

Thus currently as ONLY the White F20 has been formally measured, this is the only boat that has a rating.

It is then down to the owner, or the owners representative to ensure the boat complies to the rating and measureemnt they are claiming; if someone suspects this not to be the case; a protest should be made.




The Nacra site states values for the Nacra 20, but are these backed up by measurement? I cannot be sure without the presentation of a measurement certificate.