What does A/CR represent?

A/CR stands for Aircraft Control Right. It specifically refers to the authority or responsibility for controlling the aircraft during operations. In the context of flying, pilot roles and responsibilities are pivotal for ensuring safe and efficient management of the aircraft, particularly during critical phases such as takeoff, landing, and navigation.

Understanding this term is important as it encapsulates the fundamental aspect of piloting—who has the control at any given moment. The other options do not accurately reflect this concept as they either misinterpret the acronym or provide unrelated terms that do not exist in aviation terminology.