In aviation, which device is used for determining direction during navigation?

The VOR, or VHF Omnidirectional Range, is a crucial navigation aid used in aviation to determine the direction or bearing of an aircraft relative to the VOR station. It operates by transmitting signals that pilots can receive and interpret, essentially allowing them to determine their position and navigate along specific routes.

The device emits radio waves in all directions and provides a magnetic bearing from the station to the aircraft. By tuning into the VOR frequency, pilots can establish their heading concerning the VOR's position, which is particularly valuable for en route navigation and during instrument flight rules (IFR) conditions. The information can be displayed on the aircraft's navigation instruments, allowing for precise and reliable navigation.

In contrast, while DME (Distance Measuring Equipment) provides the distance to a station, GPS is primarily used for determining precise geographic location, and an altimeter measures altitude. Each of these devices serves different purposes in navigation and flight operations, but the VOR specifically focuses on directional guidance.