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 failure of airport personnel to correct a hazardous condition on the airport. A factor was the uncovered manhole.
The student and flight instructor not using all of the available runway, the inadequate supervision by the flight instructor and the unsuccessful remedial action by the flight instructor. The student not attaining the proper touchdown point and the plowed field were factors.
THE PILOT'S IMPROPER LEVEL-OFF AND RECOVERY FROM A BOUNCED LANDING. A FACTOR IN THE ACCIDENT WAS THE PILOT'S LACK OF TRAINING FOR RECOVERY FROM BOUNCED LANDINGS AND/OR ABORTED TAKEOFFS.