What does compass swinging refer to?

Compass swinging refers specifically to the calibration of a magnetic compass. This process involves adjusting the compass to ensure its accuracy, particularly in relation to the aircraft's magnetic field. During compass swinging, the aircraft is typically rotated in different headings while observing the compass readings. This helps to identify any deviations caused by magnetic interference from the aircraft's internal components, enabling necessary corrections to be made.

The accuracy of the magnetic compass is crucial for navigation, as it assists pilots in determining their heading relative to magnetic north. A well-calibrated compass ensures that pilots can rely on their instruments for precise navigation during flight, contributing to overall safety and operational effectiveness.