sentences:  Nowadays, most man-lifting is carried out on a dual line system, where the passenger on a single kite ascends a line held under tension by a train of kites.No kites are available commercially for the static-ground-based-anchored tethered flight of people.Note that many hang gliders are kited in various ways to get to give the participant desired altitude; sometimes just a short glide is needed; sometimes an altitude is desired that will provide an opportunity for the kited hang glider pilot to seek and find assistive thermals.