Knoxville, Tennessee-based Sea Ray's new $1.6 million 540DA Sundancer features a state-of-the-art joystick-controlled drive system allowing it to turn on a dime and literally maneuver sideways. The 54-ft. yacht has two 600 hp Cummins MerCruiser Diesel motors; the Zeus pod drive system employs propellers that work independently of each other and rotate 360 degrees on their axes to allow feats of steering impossible with traditional propulsion systems. Coupled with a sleek, aggressive exterior and