What is the main purpose of flight check-in procedures?

The main purpose of flight check-in procedures is to inform Air Traffic Control (ATC) of the current flight status and location. This process ensures that ATC is aware of each flight's readiness to depart, its status, and any relevant updates regarding its location. This communication is crucial for maintaining safe air traffic management and ensuring that all flights are effectively integrated into the airspace system.

While confirming aircraft readiness for departure, updating passengers on flight schedule changes, and filing a flight plan are all important aspects of flight operations, they do not encapsulate the primary objective of flight check-in procedures. The focus during check-in is predominantly on establishing communication lines with ATC to enhance overall safety and coordination during the flight's progression.