Part 5/8:
Assigned Transponder Codes: The distinction of transponder codes, which is crucial in air traffic control, was highlighted. Pilots possess specific transponder codes for various situations: 7500 for hijacking, 7600 for a radio failure, and 7700 for other emergencies. Delta 89's use of a non-standard code raised significant questions.
Flight Tracking Disparities: Analysis of radar data indicated that at certain crucial moments, the characteristics that identified Delta 89 diverged sharply from those of Delta 1989, raising further doubts about claims of their identity being mistakenly juxtaposed.