ATPL Subject Air Regulations (SARON) and Subject Air Meteorology and Regulations (SAMRA) Practice Exam

The correct answer indicates that if there is no filed Search and Rescue (SAR) time, the flight itinerary can be closed after 24 hours from the Estimated Time of Arrival (ETA). This period allows sufficient time for communication and potential resolution of any issues related to the flight, ensuring that necessary actions can be taken if the aircraft has not reported its arrival.

The rationale behind this extended timeframe is to incorporate factors such as delays due to unforeseen circumstances, which may prevent the aircraft from landing at its intended destination on time. It allows authorities and relevant agencies to maintain awareness of the situation for a full day, which is crucial for safety and operational integrity.

Understanding this regulation is vital for pilots and flight operations personnel, as it emphasizes the importance of monitoring flights beyond the immediate ETA. The 24-hour closure timeline is specifically designed to provide a margin for safety and to ensure that flights are adequately accounted for in case of any anomalies.