Ok, I got you. Portsmouth doesn't care what I use as a rating at a regatta. I personally feel that 65.2 is more accurate than 67.1, so I will use that number when I register (since I am full of integrity).

After I hound the RC for the elapsed times, I'll make sure they get sent in. Part of the required data is "code or class" of boat. I assume, I'd send in F16U when applicable, even though I subscribe to the F16 rating (I know, Portsmouth doesn't care about ratings).

It just seems silly to have the F16U rating, if no one uses it.