A VOR receiver is a type of navigation instrument used in aviation to determine an aircraft's position relative to a ground-based VOR station. It works by receiving radio signals transmitted from the VOR station, which allows pilots to navigate along specific flight paths and maintain their course. The VOR system provides accurate directional information, helping pilots to fly safely and efficiently. By tuning the VOR receiver to a specific frequency, pilots can identify their bearing to the VOR station and use this information to make informed navigation decisions during their flight.