is the theory, but the practice is a different ball-game. Depends on the boat, your experience, luck, etc.
Take a Bat, for instance, which is a 6 mt rib with 24 or 26 inch tubes, and is a very heavy boat. Can this be compared to those skinny fledglings which can be blown away at the sight of a big wave? Perhaps, because some might say that a rib is not a displacement vessel, and although bigger and heavier is usually better, these are many variables to take into account. The RCD cats., although offering an indication, cannot be taken as law.