Yep, many manufacturers declare their yacht to have a certain rating.
That rating is gained / calculated by using specific measurements.
Of course the rating needs to be confirmed after a check measure but
it's a starting point for new purchasers.



But it's not carved in stone, Ozzy. Otherwise no one would be adding
roach. If you're not sailing one design, you can do as you please to
improve a sailplan to suit.
In the case of the mast for the Hughes 38 it was carved in stone
however.



RB
35s5
NY