Hi Paul,



Sorry it took so long to reply, but thanks for the URL from USSA.



This web page by John Collins, however, is simply a method to convert time-on-distance PHRF to Time-on-Time PHRF. I am still unaware of any system that converts the USSA Portsmouth for catamarans to PHRF, so that they can race at these typically monohull attended events and still be scored with the same software. I've been using my formula and it seems to work OK (for now)



Thanks again!



Steve