What is the use of 'magnetic deviation correction' in avionics?

Magnetic deviation correction is primarily utilized to adjust compass readings. In aviation, the magnetic compass is susceptible to errors caused by magnetic fields generated by various electronic components in the aircraft. These deviations can lead to inaccuracies in navigation, particularly during critical phases of flight such as takeoff and landing.

By implementing magnetic deviation correction, pilots and avionics technicians can ensure that the compass provides an accurate heading relative to true magnetic north. This involves calibrating the compass to account for local magnetic influences specific to the aircraft. Accurate compass readings are essential for reliable navigation and safe operation of the aircraft.

While GPS accuracy is important for modern aviation, it is a separate system that does not rely on traditional magnetic compass readings. Additionally, enhancing navigation speed and monitoring environmental changes are not directly related to the primary purpose of magnetic deviation correction. Therefore, the focus on adjusting compass readings is the central theme of this correction.