Final answer:
Radar coverage for aircraft flying in the 48 contiguous states is extensive and provides accurate tracking of aircraft.
Step-by-step explanation:
Radar coverage for aircraft flying in the 48 contiguous states is extensive and provides accurate tracking of aircraft. Radar works by sending out electromagnetic waves and then measuring the time it takes for the waves to bounce back after hitting an object. The radar coverage allows air traffic control to monitor the position, speed, and altitude of aircraft, ensuring safe and efficient air travel.