An azimuth indicator, also known as an azimuth gyro or heading indicator, is a navigational instrument used in aircraft and marine vessels to display the aircraft or vessel’s heading or direction relative to the Earth’s magnetic north. It provides pilots and navigators with real-time information about their orientation and helps them maintain the correct heading during flight or navigation.

The azimuth indicator typically consists of a compass card or gyrocompass mounted inside a housing. The compass card or gyrocompass is oriented in such a way that it aligns with the Earth’s magnetic field or the gyroscopic effect, depending on the type of azimuth indicator.