A yawl is a two-masted boat, with the main mast being taller than the mizzen mast. Yawls are typically used for sailing and have a large sail on the main mast and a smaller sail on the mizzen mast. The mizzen mast is usually located aft of the rudder post, allowing for better control of the boat. Yawls are often used in racing and cruising, and are popular among sailors due to their maneuverability and speed.