What type of threat does the term "hijacking" refer to in aviation security?

The term "hijacking" specifically refers to a scenario where an aircraft is unlawfully seized or taken control of by an individual or group. This act is often carried out with malicious intent, such as for political purposes, extortion, or terrorism. In the context of aviation security, hijacking represents a significant threat as it endangers passengers, crew, and the integrity of the flight itself.

Unlike technical malfunctions, which pertain to issues related to the aircraft's mechanical or operational systems, or natural disasters that could disrupt flights but are not the result of human malfeasance, hijacking is a deliberate act that involves human intervention and has grave implications for safety and security. Additionally, while insider threats from airport employees are a concern, they do not encompass the direct act of taking control of an aircraft, which is the essence of hijacking. Therefore, the correct understanding of "hijacking" is centered around the unlawful seizure and control of an aircraft, marking it as a critical threat in aviation security.