VHF Omnidirectional Range (VOR) is a type of radio navigation system for aircraft. It allows pilots to determine their position and stay on course by receiving signals from ground-based VOR stations. These stations transmit radio waves in all directions, enabling aircraft to navigate accurately within a specific range. VOR is commonly used in conjunction with other navigation aids, such as Instrument Landing System (ILS) and Global Positioning System (GPS). Pilots can tune their aircraft's navigation equipment to a specific VOR frequency, allowing them to follow predetermined flight paths and ensure safe travel through controlled airspace.