What are the classes of VOR?

The classification of VOR (VHF Omnidirectional Range) navigation aids is indeed Terminal, Low altitude, and High altitude.

Terminal VORs are designed to support approaches and departures within 25 nautical miles of their facilities, typically serving busy terminal airspace. They provide reliable navigation assistance to aircraft during the critical phases of flight when arriving at or departing from airports.

Low altitude VORs are utilized for en-route navigation below 24,000 feet in the airspace, allowing pilots to navigate safely and effectively in less congested airspace compared to terminal operations. They serve broader areas and assist in transitioning between airports.

High altitude VORs are designated for en-route navigation above 24,000 feet. These VORs cover larger distances and are positioned along high-altitude airways, ensuring that aircraft can maintain efficient and continuous navigation over long distances at higher altitudes.

Understanding these classifications helps pilots effectively utilize VOR navigation aids depending on their flight phase and altitude, ensuring a safer and more organized air traffic management system. The other classifications provided in the options do not accurately reflect the recognized standards for VORs in aviation.