A Legal Analysis of 14 C.F.R. Part 91 See and Avoid Rules to Identify Provisions Focused on Pilot Responsibilities to See and Avoid in the National Airspace System

Id. at 1-20.Prior to the introduction of aircraft, landowners thought to own land and air above their land to the edge of the universe.With the advent of air commerce, if this concept remained unchecked, a pilot would technically be required to obtain landowner permission to cross every ownership along a route of flight.Obviously, this would be an impossibility.