 A mast-aft rig could, based on headsail count, be considered a variation of the sloop or cutter, or, based on mast position, a unique rig.In the typical Bermuda rig, the sails located in front of the mast generally deliver a higher percentage of the driving force.The stay that supports the leading edge of the sail causes far less turbulence than a mast, resulting in better airflow across the lee side of the sail.