Hi Mary, All three types of masts you described are all considered wing-masts. The reason, I believe, that smaller beach cats don't use wing mast's are because (1) you cannot reduce or remove the sail area if the weather turns ugly
(2) They are complicated to raise and lower the "mast" and you would have to arrange a place on your trailer to put it where it would'nt take control of your trailer at 65 mph!

Don C.