What technology aids in the monitoring of surface movements in airports?

The Surface Movement Guidance and Control System (SMGCS) is specifically designed to enhance the safety and efficiency of aircraft and vehicle movement on the airport surface. This system provides pilots and air traffic controllers with real-time information regarding the position and movement of aircraft and vehicles on runways and taxiways. It utilizes advanced technology to monitor traffic, reduce the likelihood of runway incursions, and improve overall operational safety during ground movements.

SMGCS helps to ensure that all movements are adequately tracked and coordinated, allowing for better situational awareness and guidance for both ground movements and taxiing operations. The effectiveness of SMGCS lies in its capability to integrate information from various sources, thereby offering comprehensive guidance based on the actual conditions at the airport.

In contrast, while the other options also play vital roles in aeronautical surveillance, they are not primarily focused on monitoring surface movements at airports. For instance, multilateration and ADS-B are more geared towards tracking aircraft in-flight rather than on the ground, and primary surveillance radar (PSR) is typically used for detecting airborne aircraft rather than for ground traffic management.