Describe the impact of magnetic variation on flight navigation.

Magnetic variation, also known as magnetic declination, significantly impacts flight navigation because it is the angular difference between true north and magnetic north. True north is the direction of the geographical North Pole, while magnetic north is the direction a compass needle points, influenced by the Earth's magnetic field. This difference varies depending on location and changes over time. Aeronautical charts and navigational instruments reference both true and magnetic directions. Pilots use these charts to plan their flights using true north for plotting courses, but aircraft compasses indicate magnetic no....