What is the primary purpose of the magnetic compass in aviation?

The primary purpose of the magnetic compass in aviation is to provide pilots with a direct indication of the aircraft's heading. This instrument is crucial for navigation as it helps pilots determine their orientation relative to magnetic north, enabling them to maintain the correct course during flight. The magnetic compass is a fundamental tool that aligns with the Earth's magnetic field, thereby allowing pilots to navigate effectively in various flight conditions.

The compass's ability to show the aircraft's heading is especially important for approaches, departures, and when flying in uncontrolled airspace where visual references may be limited. Understanding the heading is essential for both navigation and situational awareness during flight, making the compass a vital instrument in an aviator's toolkit.