How does ATC address non-compliance from an aircraft?

In the context of air traffic control (ATC) operations, addressing non-compliance is a critical responsibility. When an aircraft does not comply with instructions or regulations, ATC typically takes a proactive approach. The first step is to request compliance from the aircraft, which includes clearly informing the pilot of the necessary actions to align with air traffic directives.

If compliance is not achieved after this initial communication, ATC may decide to notify relevant authorities. This compliance request is essential for maintaining safety and efficiency in airspace management, as it allows air traffic controllers to manage the situation and ensure that all aircraft operate within the agreed parameters. Effective communication is crucial in these instances to avoid potential hazards and ensure that all aircraft are aware of their operational requirements.

The other choices do not align with proper ATC protocol. Ignoring non-compliance could lead to serious safety risks or operational inefficiencies. Imposing fines and penalties is not within the immediate jurisdiction of ATC and typically falls under regulatory authorities, while allowing an aircraft to proceed without necessary changes would also pose safety concerns. Therefore, the most appropriate course of action is to actively request compliance and escalate the situation if necessary.