Which of the following is a primary function of an ATCRBS?

An ATCRBS, or Air Traffic Control Radar Beacon System, plays a crucial role in aviation surveillance and safety by identifying and tracking aircraft transponders. This system utilizes radar to detect aircraft equipped with transponders that respond to interrogations with information about their identity and altitude. By collecting this data, air traffic controllers can maintain situational awareness of aircraft positions in their airspace, enabling safe separation and efficient traffic management.

The other options relate to functions that are either outside the scope of ATCRBS or involve different technologies that serve distinct purposes in aviation. For instance, communicating directly with aircraft is typically handled by radio communication systems, while providing weather updates falls under the responsibilities of meteorological services rather than air traffic control systems. Control of runway traffic is managed by ground control and not by the ATCRBS, which focuses specifically on airborne surveillance.