Definition
A set of recommended pilot techniques for taking off, landing, and maneuvering in a way that avoids the wingtip vortices (rotating air masses) trailing behind larger or heavier aircraft. These procedures include adjusting flight path, takeoff and landing points, and timing relative to the preceding aircraft to stay clear of the descending and drifting vortex cores.
Plain English
Steps a pilot takes to stay out of the invisible spinning air left behind by bigger aircraft, which can be strong enough to upset or roll a smaller plane.
Context Anchor
Seen in wake turbulence training, traffic pattern operations, takeoff and landing planning, and instructions involving spacing behind other aircraft.
Derivation
From Latin 'vortex' meaning a whirling mass of air or water. The term reflects the spinning, tornado-like pattern of air shed from each wingtip of an aircraft producing lift.
Why Pilots Care
Wake vortices from heavy aircraft can produce sudden roll rates that exceed a smaller airplane’s control authority, leading to loss of control near the ground.
Grounding Statement
Picture an aircraft leaving two invisible rolling tubes of air behind its wingtips; vortex avoidance procedures keep you from flying through those tubes.
Intuition Check
Do not assume vortices are only a problem behind very large jets. Any aircraft can create them, and they are most hazardous when you are low, slow, and close behind another aircraft.
Example Sentence 1
When following a heavy jet on approach, the pilot used vortex avoidance procedures by staying above the jet's flight path and landing beyond its touchdown point.
Example Sentence 2
On short final the instructor reminded the student to apply vortex avoidance procedures by staying slightly above the preceding aircraft’s flight path.