Of current interest: Volscan automatic electronic system controls landing of incoming planes

VOLSCAN, developed in secrecy over the past 5 years, is an automatic electronic system for bringing aircraft into a base at precise intervals of 30 seconds. In thousands of flight tests with many types of jet and propeller-driven airplanes during the past year, the system has proved to be the long-sought means of eliminating the “stacking up” of planes over busy military and civilian airports. Airport traffic controllers at most bases today often are forced to delay aircraft for long periods of time because manual systems can control, at the most, 40 aircraft per hour.