where this plane could have gone down and not have been spotted. how many of those areas exist? those exist in many places when you are under oceanic procedures. once you are outside of land or outside of radar range, you are not in any sort of physical contact if you disable the airplane system. swavlling around t traveling the globe you won t have data much like if you were driving in your car cell phone would drop out and come back in. those are little spots around the globe and they do experience that. when you are traveling outside of land outside of radar range if you disable some of the communications in the airplane then you are flying in blind if you will and to other controllers in other aircrafts aren t able to see you.