During which phase do pilots become familiar with flight controls and check systems?

The phase during which pilots become familiar with flight controls and check systems is typically referred to as the "Check phase." In this phase, pilots ensure that all aircraft systems are functioning correctly and that they are comfortable with the operational control surfaces before proceeding with the flight. This includes performing checks on instruments, navigation systems, and other critical components, thereby solidifying the pilot's understanding and operational readiness for the subsequent phases of flight.

During other phases, such as the takeoff or cruise phases, the primary focus shifts to managing the flight itself rather than familiarizing oneself with the controls or systems of the aircraft. The taxi phase is primarily associated with moving the aircraft on the ground and completing pre-flight checks, but it does not typically emphasize the thorough familiarization with the flight controls in the same depth as the Check phase does.