Part 3/5:
What Do ‘Unknown’ Tail Numbers and Departure Times Mean?
During the conversation with a BTS representative, it became clear that entries with “unknown” tail numbers usually indicated canceled flights. When a flight does not take off, it logically follows that certain data fields, like the tail number or accurate departure time, may not be available. The representative affirmed that a departure time of ‘00:00:00’ typically suggests that the flight indeed did not occur, thereby confirming the user’s hypothesis.