The surface movement guidance and control system becomes effective at what Runway Visual Range (RVR)?

The correct answer is that the surface movement guidance and control system (SMGCS) becomes effective at an RVR of 1,200 feet. This system is crucial for managing aircraft movements on the ground, particularly in low visibility conditions. The implementation of SMGCS is aimed at reducing the risk of runway incursions and enhancing safety by ensuring that aircraft and ground vehicles can safely navigate during reduced visibility situations.

When the RVR falls below this threshold, typically at 1,200 feet, it becomes essential for airports to utilize advanced guidance systems to maintain an orderly flow of traffic while ensuring the safety of operations. The guidelines for the application of the SMGCS are put in place by aviation authorities to provide standards for operational safety in challenging conditions.