The yawl , characterized by a two mast configuration with the largest mast forward , is distinguished from the ketch by the smaller size of the mizzen mast , typically aft of the rudderpost in traditional sailing craft .
Is not a driving sail .
the yawl , characterized by a two mast configuration with the largest mast forward , is distinguished from the ketch by the smaller size of the mizzen mast , typically aft of the rudderpost in traditional sailing craft , but is not a driving sail .