VOR, or VHF Omnidirectional Range, is a type of radio navigation system used by aircraft to determine their position and stay on course. It operates by transmitting a signal that pilots can receive with onboard equipment, allowing them to navigate accurately to and from specific locations, such as airports. The VOR system is essential for air traffic control and helps ensure safe and efficient flight operations. It is often used in conjunction with other navigation aids, such as GPS and ILS (Instrument Landing System), to provide comprehensive guidance for pilots during their flights.