Airplane manufacturers also name a global origin for each airplane. This because all the parts on the airplane need to be located precisely and they do not wish to just bolt one thing to another and let things go where they happen to fit. The global origin is ahead of the nose located on centerline a few feet in front of whatever the foremost part of the airplane might be. It can be quite a few feet ahead of the airplane because pitot booms and other gear are fitted for testing which they want in a positive region. The global center is located below ground also, because no part or assembly is negative if it is placed there.