USA TODAY US Edition

All pilots use this weather jargon

- John Cox Special for USA TODAY

Q While watching a YouTube

presentati­on on general aviation, I encountere­d the use of the term “Informatio­n Juliet” and other “Informatio­n” names. What is the meaning of such terms, and are they used in commercial aviation?

— Steven Schwartz, Ohio A“Informatio­n“informs the that the pilot has received and understood the Automatic Terminal Informatio­n Service (ATIS) weather and informatio­n broadcast. The broadcast is given a letter designatio­n and named by the phonetic alphabet. “Informatio­n Juliet” is weather and relevant airport informatio­n that was updated from the previous observatio­n that would have been designated “Hotel.” All pilots (general aviation, airline and military) use this communicat­ion tool with controller­s. Q What is the difference between a stabilator and an elevator? — Ahmedabad A The elevator is a movable panel

on the trailing edge of the horizontal stabilizer that causes the nose to pitch up and down. An elevator does not move the entire stabilizer, only the panel on the back.

A stabilator moves the entire horizontal stabilizer to pitch the nose up and down. It is more efficient than an elevator. Q I have read about a “flaperon”

being found as evidence in the MH 370 accident. What is this control surface’s function, and where is it found on the aircraft?

— Craig, Ivanhoe, Ill. A The flaperon on the B777 is located

just aft of the engine. It moves up and down, providing roll control like an aileron, and extends aft like a flap. The name is a combinatio­n of these two flight controls.

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