There are 24 centers across the country, in locations away from the airports. Los Angeles
Center is located in Palmdale, about 60 miles north of Long Beach airport. You will never
see these controllers during the course of your flight, but they will normally direct your
aircraft for the bulk of your ride. They usually control traffic at or above 17,000 feet.
But, over Southern California they control at or above 13,000 feet. Center controllers use
radar or manual procedures to keep track of the thousands of planes in the sky at any one
time. The typical center has responsibility for more than 100,000 square miles of airspace
generally extending over a number of states.