Final answer:
A properly equipped civilian airplane can use a TACAN station for navigation purposes. TACAN stands for Tactical Air Navigation and it is a radio navigation system used by both military and civilian aircraft.
Step-by-step explanation:
A properly equipped civilian airplane can use a TACAN station for navigation purposes. TACAN stands for Tactical Air Navigation and it is a radio navigation system used by both military and civilian aircraft. It provides pilots with distance and bearing information that can be used to determine their position relative to a ground station or another aircraft. The TACAN system works by sending out signals that are received by the airplane's TACAN receiver, which then calculates the distance and bearing to the station.