Definition
A systematic technique for visually searching the sky outside the aircraft to detect other traffic, terrain, weather, and obstacles, using a series of short, regularly spaced eye movements that bring successive areas of the sky into the central field of vision.
Plain English
A planned way of moving your eyes across the sky in small steps so you actually see things that are out there, instead of just staring straight ahead and hoping to spot them.
Context Anchor
Used in collision avoidance, especially before turns, during climb and descent, near airports, and any time the pilot is responsible for watching outside the aircraft.
Derivation
From the Latin scandere, meaning 'to climb' or 'to step.' The word later came to mean examining something step by step. That is exactly what a pilot does — moving the eyes through the sky in deliberate steps rather than sweeping smoothly across it.
Why Pilots Care
Effective visual scanning is the primary defense against mid-air collisions, especially in visual meteorological conditions.
Intuition Check
Do not think of scanning as quickly sweeping your eyes across the windshield. In flying, visual scanning means searching deliberately, with brief pauses, so your eyes have time to notice traffic.
Example Sentence 1
During cruise, the pilot used a regular visual scanning pattern, pausing on each segment of sky long enough for any traffic to register.
Example Sentence 2
Before entering the traffic pattern, the instructor reminded the student to increase visual scanning to clear for other aircraft.