FAA Aircraft Dispatcher Practice Exam

What is the operational service volume of a low VOR up to 12,000 feet AGL?

1. 25 NM

2. 40 NM

3. 60 NM

4. 30 NM

The correct answer is: 25 NM

The operational service volume of a low VOR (VHF Omnidirectional Radio Range) is specifically designed for use below 12,000 feet AGL (Above Ground Level). In the United States, the FAA designates the service volume of a low VOR as extending up to 25 nautical miles from the VOR station. This range is optimal for aircraft operating at low altitudes, such as those in the terminal or en route phases of flight below 12,000 feet. This service volume ensures that pilots and aircraft can reliably receive the VOR signals required for navigation and maintaining course. The other distances mentioned in the options pertain to higher service volumes, which are applicable to high altitude VOR stations, typically designed for air traffic operating at altitudes above 12,000 feet AGL. Each type of VOR is tailored for specific operational requirements and altitudes, making the 25 nautical mile operational service volume of a low VOR the correct choice.