MagVar Tables are utilized for what primary purpose in aviation?

MagVar Tables, or Magnetic Variation Tables, serve the primary purpose of converting true heading to magnetic heading. This conversion is crucial in aviation navigation, as pilots must understand the difference between true north (the geographic north pole) and magnetic north (where a magnetic compass points). The earth's magnetic field varies in different locations and over time, which means that true headings must be adjusted based on local magnetic variations to ensure accurate navigation.

Using MagVar Tables allows aviators to apply the necessary corrections to their courses, ensuring that they are heading in the intended direction. Magnetic variation is expressed in degrees east or west, indicating how much the magnetic north differs from true north. This information is essential for effective flight planning and in-flight navigation, thereby enhancing overall safety and efficiency in aviation operations.