Under what condition are all non-essential airside operations suspended?

The correct response revolves around the conditions for visibility and safety on the airside of the airport. Specifically, all non-essential airside operations are suspended when the Runway Visual Range (RVR) is below 1200 meters. The RVR is a key parameter that indicates how far a pilot can see down the runway, which is directly linked to safety during takeoff and landing.

When the RVR drops below this threshold, it indicates low visibility, making ground operations particularly hazardous. In these scenarios, the airport prioritizes safety by halting non-essential operations to minimize risk to personnel, equipment, and aircraft. This means that only essential operations, such as emergency services or critical aircraft movements, may continue.

In contrast, RVR values above specified levels indicate adequate visibility where non-essential operations can be performed safely, and suspension during night operations alone does not reflect the conditions governed by visibility metrics. Thus, the clarity around the threshold of RVR being below 1200 meters directly supports the need for operational suspension.