Abstract: An air traffic proximity device operates at a local aircraft to track remote aircraft proximate to the local aircraft. A receiver captures a received signal, such as an ADS-B signal, transmitted by a remote aircraft. The device parses the received signal to determine location data and velocity data indicating location and velocity of the remote aircraft, and determines a relative position of the remote aircraft as a function of a position of the local aircraft. Based on this relative position, the remote aircraft is assigned to a proximity zone as a function of a distance between the local aircraft and the remote aircraft, velocity of the local aircraft, and velocity of the remote aircraft. A display provides a representation of the remote aircraft positioned relative to the location and velocity of the local aircraft, as well as a representation of the proximity zone encompassing the representation of the remote aircraft.