Red, Amber, and Green threat levels are a set of ‘traffic light’ security protocols on engaging a UAS or drone threat and when it is deemed a threat in the context of a stadium or other mass gathering.

Green– No impact- monitor. An issue that occurs outside routine activity and does not disrupt operations.

Amber– Enhanced state. An issue that causes or could cause disruption. Neutralization by counter-UAS technology or other methods is probable.

Red– Detect and respond—a significant issue or incident causing an emergency or major disruption. Neutralization by counter-UAS technology or other methods has failed, and evacuations or other public safety measures are to be activated.

Reference- Stadia Protection and Mitigation from Drone Incursion and Threats