What does an agonic line represent?

An agonic line represents a line of zero magnetic variation. This concept is important for navigators and pilots because it helps in understanding the relationship between magnetic north and true north, which can significantly affect navigation.

In practical terms, pilots rely on magnetic compasses, which are influenced by Earth's magnetic field. The agonic line is where magnetic north and true north align, meaning that there is no difference (variation) between the two in that specific area. This can help pilots in flight planning and navigation because they can calculate headings more accurately when near this line.

Understanding the agonic line is crucial in flight operations, especially for long-distance flights, where compasses and navigation systems may vary significantly in different geographic locations. Accurate navigation is essential for safety in aviation, making the knowledge of magnetic variations and lines like the agonic line critical for pilots.