What is an isogonic line?

An isogonic line represents lines of equal magnetic variation. These lines are crucial for pilots to understand because they indicate the differences between true north and magnetic north across different geographical locations. This variation is essential for navigation, as it helps pilots correct their magnetic compass readings to ensure they fly accurately along their intended flight path.

Knowledge of isogonic lines assists pilots in adjusting their navigation calculations based on the local magnetic variation, which can change from one location to another. This understanding is a key element of effective navigation, ensuring that pilots can safely and accurately traverse the airspace. Thus, recognizing the significance of isogonic lines is fundamental for any pilot involved in flight planning and navigation.