Plain English Meaning
It is the thinking process a pilot uses to make good choices in the cockpit — looking at the situation, weighing the options, and picking the safest action.
Full Definition
A systematic approach to the mental process used by pilots to consistently determine the best course of action in response to a given set of circumstances during flight operations.
Context Anchor
Seen in pilot training, flight planning, in-flight problem solving, and discussions of the FAA Three-P Model for pilots.
Derivation
Aeronautical comes from the Greek 'aer' (air) and 'nautikos' (relating to ships or sailing) — literally 'sailing through the air.' Combined with ',' the phrase points to the structured a pilot applies while operating in the air, where choices carry more than on the .