My new GPS antenna location. It must not be shadowed by other antennas, which required measuring from the proposed location to the other antennas in that location. Getting it straight was done using our eyes from several different locations. There were no definite body lines to follow. Several minutes were devoted to checking the orientation of the antenna from every angle. Once we were satisfied, the four mounting holes were drilled. Once again, I sat inside the airplane with a cup to catch the metal while Jacob drilled the holes.