While controversial, ICAO suggests that if the flight crew escapes, the aircraft becomes a "standard law enforcement barricade/hostage situation," which can often be more manageable for authorities. Best Practice: The decision to escape should remain at the discretion of the Pilot-in-Command (PIC)
Historically, safety was measured by the absence of accidents. ICAO Doc 9811 shifts this metric. It introduces the concept of measuring safety performance through data collection and analysis. By tracking leading indicators—such as separation minima infringements, runway incursions, or communication failures—ATS providers can predict where accidents might occur and intervene proactively. icao doc 9811 best