Pitch, roll and heave are auto-controlled via surface sensors and yaw control is pilot induced via a bow mounted air rudder. The boat is a 'one way' proa. Though it sails quite happily on the 'off' tack, it can do so only when hull-borne. The pilot sits in the windward ama, fully 24 ft. to windward of the main hull and rig. The boat carries an additional 32 sf.
All aerofoils are symmetrical sectioned rigid wings.
Its center of effort is 15 ft. to windward of the main hull. This wing is actuated by a leading edge mounted surface sensor on an 8 ft. arm. This sensor gives the wing a nose up attitude when hullborne and a nose down attitude when the windward ama rises too high. At low speeds, the upward lift from the wing helps ama lift-off. At higher speeds, downward lift from the wing counteracts heeling due to sail forces.