What does a Category D incident signify?

A Category D incident signifies an occurrence in which there is an incorrect presence of one vehicle, person, or aircraft in a protected area, indicating a serious breach of safety protocols. Such incidents are critical because they can lead to dangerous situations, especially in environments like airports, where restricted areas are essential for maintaining safety and preventing accidents. Recognizing and categorizing this type of incident is vital for ensuring that immediate corrective actions can be taken to prevent potential hazards and maintain operational integrity. The definition of Category D incidents underscores the importance of strict access control and adherence to safety regulations in high-risk areas.