Coverage depends on ground receiver reception and is not a complete picture of traffic.
The hex code is the aircraft's ICAO 24-bit address, broadcast by its ADS-B transponder. It is the key used to match live position reports to this registration.
the B767 Captain's failure to maintain a safe clearance between his wing and the tail of the CRJ900 that was stopped on a taxiway.
The flight crew’s failure to identify the correct landing surface due to fatigue. Contributing to the cause of the incident were (1) the flight crew’s decision to accept a late runway change, (2) the unavailability of the approach light system and the instrument landing system for the runway of intended landing, and (3) the combination of numerous taxiway signs and intermixing of light technologies on the taxiway.
the improper installation of the generator feed cable by the manufacturer, which resulted in a severed aileron cable due to arcing between the generator feed cable and aileron cable.