He asked: "Why didn't they install GPS on the plane?
A: The tracking of airplanes is almost entirely radar based, either commercial or military. Some planes have global position systems to help with navigation but they are not tracked on the ground. Since Flight 370 went missing, many people have asked this question and it is likely that tracking systems will be upgraded to ensure a plane is never "lost'' again. However, who will pay for the changes and coordinate their implementation remains under debate.