A Boat New to the US, Haase
has that type of jib system. It was shown at the Cleveland Boat Show, and several of us had an opportunity to look it over. Basically, it has two (one on each side of the mast) arms extending from the base of the mast. These are a track type of system that actually lock down the jib, so no jib sheets (as we know them) are used. When you tack, this track allows for movement back and forth across the boat for either a port or starboard tack. Simple to understand when you see it. Don't have any idea how it sails, but the jib is small to allow clearance in front of the mast, completely.