The magnetic compass in airplane cockpits, often underappreciated and misunderstood, remains one of the most reliable navigational tools due to its independence from external power sources. Despite modern avionics like AHRS and GPS, which rely on electricity and signals that can fail, the magnetic compass continues to function as long as the Earth's magnetic field exists. It does have errors, but these are consistent and manageable with proper understanding, ensuring it can guide pilots effectiv