What defines an unreported aircraft?

An unreported aircraft is defined by the time from a compulsory reporting point to when the aircraft is considered overdue. This time frame is critical for air traffic controllers, as it indicates that the aircraft has not reported its position or has not passed a designated reporting point within the expected time frame. This criterion allows ATC to assess situational awareness and urgency regarding aircraft that may need assistance, tracking, or potential search and rescue operations.

While having an aircraft that has not taken off, cannot be located, or reports its position late may reflect various situations, they do not encompass the specific definition of "unreported" in the context of ATC. The focus on the temporal aspect of reporting ensures that controllers can maintain safety and efficiency in managing air traffic.