Definition
An instrument scanning pattern in which the pilot's eyes move in a rectangular path around the instrument panel — across the top row of flight instruments and back along the bottom row — sampling each instrument in sequence rather than fixating on any single one. It is one of several recognized cross-check methods used in attitude instrument flying.
Plain English
A way of moving your eyes around the cockpit instruments in a rectangle shape so you keep checking all of them in turn, instead of staring at just one.
Context Anchor
Seen in instrument flying when learning how to scan the standard analog flight instruments.
Derivation
From Latin rectangulus, meaning 'right-angled.' The name simply describes the shape the eyes trace across the panel — a rectangle around the cluster of flight instruments.
Why Pilots Care
Prevents fixation on a single instrument and maintains balanced awareness of attitude, altitude, and heading.
Intuition Check
Rectangular does not mean the airplane is flying a rectangular route. It describes the pattern the pilot’s eyes follow across the instruments.
Example Sentence 1
During his first hood session, the student used a rectangular cross-check to keep his scan moving across all six flight instruments.
Example Sentence 2
While practicing turns under the hood, the rectangular cross-check kept altitude steady while the heading changed.