At uncontrolled airports, pilots are recommended to broadcast their intentions while backtracking in the interest of safety; for example, the statement "Entering and backtracking runway 36" would indicate the aircraft is taxiing along a magnetic heading of 180 degrees, against the flow of traffic.
At uncontrolled airports, pilots are advised to announce their intentions while reversing course for safety reasons; this statement describes the process of "Entering and retracing runway 36" which indicates the aircraft is traveling on a magnetic heading of 180 degrees against the direction of traffic flow.