Various types of kite exist, ranging from materials, shape, usage, skill required to operate, and so on. A modified parachute that has a positive lift/drag ratio is a kite. A tethered body that does gain a positive lift/drag ratio upon being towed in some media is a kite. Kites have their wing body and kite line; the kite line is moored to a fixed or moving body which even could be the kite line itself; the moving body could be a falling payload or human pilot as in some hang gliders. Kites of very low stable lift/drag ratio are only rarely treated as kites, but as streamers and flags. Kites may fly in air or in water or other media. A deflection off the direction of the ambient stream obtains because of the shape of the kite's wing. New types of kite continue to be invented and designed.