Definition
The continuous, systematic scanning of flight instruments and outside references to monitor aircraft performance, attitude, and flight path, comparing the information from multiple sources to detect discrepancies, confirm expected indications, and maintain situational awareness.
Plain English
Continuously moving your eyes between several instruments and the view outside, comparing what each one tells you, so you always know what the airplane is doing and can spot anything wrong right away.
Context Anchor
Used during the initial climb after takeoff, when the pilot is dividing attention between the outside view, the airplane’s climb, and key instrument indications.
Derivation
From 'cross' (across, between two things) and 'check' (to verify or confirm). The idea is verifying one piece of information against another, rather than relying on a single source.
Why Pilots Care
Detects instrument errors or failures early and prevents loss of control or deviation from the intended flight path.
Intuition Check
Cross-checking does not mean checking something once and moving on. It means repeatedly comparing information from more than one place so one clue confirms, or questions, another.
Example Sentence 1
During the initial climb, the pilot continued cross-checking airspeed, attitude, and altitude to confirm the airplane was performing as expected.
Example Sentence 2
When the heading began to drift the pilot cross-checked the turn coordinator against the directional gyro to identify the problem.