What term describes a procedure designed to manage arrivals at busy airports?

The term that describes a procedure designed to manage arrivals at busy airports is known as a Standard Terminal Arrival Route (STAR). A STAR is a pre-defined flight path established to guide aircraft from the en route phase to the terminal area with increased efficiency and safety. This procedure helps to streamline traffic into busy airports where the volume of arriving flights can create congestion.

Using a STAR allows air traffic controllers to sequence arrivals, minimize delays, and efficiently manage the flow of air traffic. By following these established routes, pilots can also anticipate the required altitudes and speeds, ensuring more organized and predictable landings.

The other options represent different types of aviation procedures that serve distinct purposes: a Standard Instrument Departure (SID) aids in the initial climb from the airport, Route Clearance involves the plan given to pilots prior to departure, and an Approach Procedure governs the maneuvering of aircraft as they descend toward the runway for landing. Each serves its function, but the STAR specifically addresses the management of arrivals, making it the correct choice here.