Why is it important for pilots to monitor magnetic variation periodically?

Monitoring magnetic variation periodically is crucial for pilots because it directly affects the accuracy of navigation. Magnetic variation, which is the angle between magnetic north and true north, can change over time due to shifts in the Earth's magnetic field. If pilots are not aware of the current magnetic variation, they risk making navigational errors that could lead to incorrect headings being flown.

Accurate navigation is essential for ensuring that the aircraft reaches its intended destination safely and efficiently. Outdated navigational information could result in deviations from the planned flight path, increased risk of collisions, or difficulties in maintaining safe separation from other aircraft. Updated charts provide the necessary information on the current magnetic variation for a specific area, and pilots must check this periodically to remain compliant with safe navigational practices.

By staying informed about changes in magnetic variation, pilots can enhance their situational awareness and make more precise navigational decisions, ultimately promoting flight safety.