Most of the sailing world calls the masts on current beachcats wingmasts. By my definitions the masts on new A-class boats are wingsmasts. For most other cats, they are in a grey area. However, they can produce a surprising about of lift. If you want to see, wait till it's really blowing, turn the boat beam to wind, and then play with the rotator. I did that years ago while trying to hold the boat down in a storm.