 A cutter is a single masted vessel, differentiated from a sloop either by the number of staysails, with a sloop having one and a cutter more than one, or by the position of the mast, with a cutter's mast being located between 50% and 70% of the way from the aft to the front of the sailplan, and a sloop's mast being located forward of the 70% mark.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.