What should the Pilot in Command do if a flight rule is deviated from during an emergency?

In the event of an emergency where a flight rule is deviated from, the Pilot in Command is required to immediately report the deviation to Air Traffic Control (ATC). This is vital for several reasons.

First, timely communication with ATC ensures that they are aware of the situation and can provide the necessary assistance. This could include rerouting other aircraft, providing prioritization for landing, or advising on potential hazards in the area.

Second, accountability and safety are paramount in aviation. Notifying ATC of any deviations allows for proper records to be maintained and helps in the post-incident analysis. This ensures that any necessary follow-up actions can be taken to review the incident and implement measures to prevent future occurrences.

Lastly, immediate reporting aligns with regulatory requirements that mandate pilots inform ATC of any deviations that affect safety, thereby reinforcing the culture of safety and communication within aviation operations.

Considering the other options, notifying ATC after landing or just making a note for the next flight would not provide the necessary immediate response to the situation, and physically checking fuel levels, while important, does not address the priority of communicating the deviation to ensure situational awareness and safety for all parties involved.