Patent ID: 8479883

Claim:
An improved rappelling system for raising or lowering a person or an object to or from a moving helicopter comprising: a single cable for supporting a person or an object, wherein said cable comprises a detector attached to its lower end; a motor attached to said helicopter and coupled to said cable so that said motor propels said cable up or down and thereby raises or lower said person or object, respectively; a controller for controlling the motion of said motor; at least three sensors attached to three different locations of the helicopter, respectively, and being coupled to said controller, wherein said three sensors measure the distances of said three different location of the helicopter—from three different locations in a target area located at a lower point than said helicopter and continuously send feedback signals to said controller and wherein said feedback signals comprise said measured distances and are used to generate a three-dimensional view of the target area and to calculate and adjust in real-time motor control parameters that determine speed and landing location of said person or object relative to said target area; and a display coupled to said controller for displaying said measured distances, said three-dimensional view of the target area and said calculated motor control parameters in real-time.