How are the bearing and ME frequencies of a TACAN assigned?

The correct answer is that the bearing and ME frequencies of a TACAN (Tactical Air Navigation) system are assigned by channel. TACAN is a navigation system that provides range and bearing information to aircraft, commonly used by military aircraft.

In this context, the term "channel" refers to a specific frequency band assigned for each TACAN station, allowing the aircraft to distinguish between different stations. Each TACAN channel corresponds to a unique pairing of bearing and distance data. This channelized structure ensures that multiple TACAN stations can operate in close proximity without interference, maintaining the integrity of the navigation signals received by aircraft. Each TACAN station broadcasts on a specific channel that defines its frequency, and both the bearing and ME (Measure of Equipment) frequencies are derived from that assigned channel, allowing pilots to accurately determine their position relative to the station.

The other options do not accurately represent how TACAN frequencies are assigned; coordinates, frequency modulation, and altitude do not play a role in this specific process for TACAN navigation systems. Understanding the channel-based assignment is crucial for pilots and navigators in effectively utilizing TACAN systems in flight operations.