As i recall, the actual old meter formula was relatively simple. Figuring out a couple of the variables to plug into the formula is where it got pretty complex. It was not as simple as the newer style box rules or anything using a VPP. I think one of the variables in the formula measured the hull depth at various locations. Try googling 12 meter class and see what you find. There are still some of them racing on the East coast so they must have some set of rules. Also try looking up the 6 meter class and 8 meter class. These are both still actively raced.

The boats were pig slow, but they had a certain elegence in their hull forms that I alwasy liked. Cheers.

TB