What is posted to identify and report incursions by non-participating aircraft?

The correct response identifies "Vertical Hazard Notices" as the means used to identify and report incursions by non-participating aircraft. These notices are critical in aviation safety protocols, as they provide clear guidance to pilots and air traffic control regarding specific airspace restrictions that may be in effect.

Vertical Hazard Notices communicate the established altitude which should not be violated, helping to prevent the risk of collisions or disruptions among aircraft, particularly in complex operating environments where different types of aircraft may coexist. By having these notices in place, personnel are alerted to potential hazards and can take the necessary precautions to ensure safety.

Other options, while they may relate to aviation operations, do not serve the same specific purpose. For instance, Flight Height Markers generally indicate specific altitudes relevant to terrain or airspace, No Fly Zone Indicators highlight areas where aircraft are not permitted to fly, and Aerial Surveillance Alerts may pertain to tracking movements but do not specifically focus on the incursions by non-participating aircraft. The focused nature of Vertical Hazard Notices makes them the appropriate choice for this context.