What could potentially happen if you fail to report your updated ETA with FSS?

Failing to report your updated estimated time of arrival (ETA) to Flight Service Station (FSS) can lead to the initiation of search and rescue operations. When pilots do not communicate changes in their flight status or arrival times, it raises concerns about their whereabouts and safety. If the FSS or air traffic control has no updated information, they may perceive that the aircraft is overdue and could potentially be in distress. This situation prompts them to initiate search and rescue procedures to locate the pilot and aircraft, ensuring that no one is in danger.

While other options might seem relevant in a broader context of flight operations, they do not specifically capture the critical implications of not updating ETA, which centers around safety and accountability in aviation operations.