 This involves a moving object, like a car or a boat, attached to a paraglider or hang glider with a fixed-length line.This can be very dangerous, because now the forces on the line have to be controlled by the moving object itself, which is almost impossible to do, unless stretchy rope and a pressure/tension meter (dynamometer) is used.Static line towing with stretchy rope and a load cell as a tension meter has been used in Poland, Ukraine, Russia, and other Eastern European countries for over twenty years (under the name "Malinka") with about the same safety record as other forms of towing.