When considering the problems of take-off and landing from the pilot's point of view, the most important fact to remember is that he is a human being. This drawback immediately limits his capabilities in the operation of an aeroplane because the control of a pilot's actions is through the computer we call the brain. This computer, although extremely efficient in almost all functions, has nevertheless serious limitations when it comes, first, to speed of computation, and secondly, the number of functions it can compute at one time.

Until now the speed of operation of aircraft has been compatible with the speed of computation of the human brain that is governing the pilot's reactions. Also the size and complexity of the aircraft and the operation have been compatible with the number of functions the brain can compute at one time