There's no complexityto a rotating mast. It sits on a pin (at deck level) and (by clever use of string and a lever) rotates with the boom. By adjusting the string between the boom and mast the angle of the mast relative to the (apparent) wind can be altered. I think most small cats (not Chesire variety) use this system.
Dangly poles are frowned upon by the NS14 class due to the windage but boom launched ones are quite common and don't seem to adversely affect the mast rotation.
Dangly poles are frowned upon by the NS14 class due to the windage but boom launched ones are quite common and don't seem to adversely affect the mast rotation.