August 1958 Issue [Article] A gadget to cut down on mid-air collisions Download PDF Adjust Share by A.M. (Arthur Martin) Watkins, Subscribe or log in to continue reading. Tags 20th century Aircraft accidents Doppler navigation Inertial navigation (Aeronautics) United States More from A.M. (Arthur Martin) Watkins St. Louis takes the cure A case history for ailing cities Shell housing A blessing with a few bugs in it A good house nowadays is hard to find Adjust Share