USA TODAY US Edition

Who flies the plane during severe turbulence, the pilots or autopilot?

- John Cox

When an airplane encounters severe turbulence, does the pilot manually take over the plane, or is it left on autopilot?

– TRL, New Mexico

Usually the pilots will leave the autopilot engaged. In small airplanes with limited autopilots, it is better to fly manually, but with more sophistica­ted airplanes the autopilot is a valid option in turbulence.

Severe turbulence is actually very rare. What most passengers think is severe is moderate-to-heavy turbulence. You know it’s severe when unsecured items in the cabin are flying around and maintainin­g control of the flight path is momentaril­y disrupted.

Why are clouds so turbulent in Florida, for example, but generally not turbulent at all in a place like London

or Dublin? – MB, Miami

Florida has a lot of cumulus clouds, especially during the summer. These clouds have vertical columns of air – up and downdrafts – that result in turbulence.

Cooler climates such as London and Dublin have fewer cumulus clouds. Often they have more uniform stratus clouds that do not have the frequent vertical columns of air.

Turbulence can occur anywhere, but a sunny, hot day in Florida, combined with cumulus clouds, will provide a few bumps for airplanes flying through them.

John Cox is a retired airline captain with US Airways and runs his own aviation safety consulting company, Safety Operating Systems. The views and opinions expressed in this column are the author’s and do not necessaril­y reflect those of USA TODAY.

 ?? RATSTUBEN/GETTY IMAGES ?? Usually, the pilots will leave the autopilot engaged when an airplane encounters severe turbulence. In small airplanes, it is better to fly manually, but with more sophistica­ted airplanes the autopilot is a valid option.
RATSTUBEN/GETTY IMAGES Usually, the pilots will leave the autopilot engaged when an airplane encounters severe turbulence. In small airplanes, it is better to fly manually, but with more sophistica­ted airplanes the autopilot is a valid option.

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