FAA Aircraft Dispatcher Complete Practice Exam

The service volume of a high VOR (VHF Omnidirectional Range) is defined by the altitudes and distances over which it can provide reliable navigation signals. A high VOR typically operates with a higher frequency and is designed to serve aircraft operating at higher altitudes, particularly in terminal and en-route airspace.

The correct choice states that the service volume ranges from 1,000 feet to 14,500 feet AGL (Above Ground Level) at a distance of 40 nautical miles. This range allows the VOR to accurately provide navigational guidance to aircraft operating in lower to mid-altitudes, enhancing their ability to navigate effectively in various phases of flight, especially in the terminal area where VORs are often used for approach and departure procedures.

This volume effectively supports aircraft flying at altitudes where they are transitioning to or from the en-route structure or performing approaches at controlled airports. The specified distance ensures that the VOR signal remains strong and usable by pilots within that range, facilitating safe navigation.

In contrast, other options refer to different altitude ranges or distances that do not align with the standard service volume defined for high VORs, which is why they are not the correct choice.