Which defines Alert 3?

• A. An accident on the airport surface area
• B. An aircraft incident
• C. A weather advisory
• D. A runway incursion

Answer: (A)

Alert levels in tower operations are used to quickly convey the type and location of an incident so responders can react appropriately. Alert 3 specifically denotes an accident on the airport surface area. This designation signals the need to activate the airport’s emergency procedures, alert Aircraft Rescue and Fire Fighting (ARFF), and coordinate with airport operations to secure the scene and manage ground traffic. It’s distinct from a weather advisory, which supplies information about weather conditions rather than an on-scene emergency, and from a runway incursion, which is an unsafe entry onto the runway with its own specific response. An aircraft incident could refer to various situations, but the “on the surface” element and the immediate need for ground emergency response are what define Alert 3.