Aeronautical Terms beginning with J

J

joule

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J/g

joules per gram

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J/kg

joules per kilogram

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Jamming

Electronic or mechanical interference which may disrupt the display of aircraft on radar or the transmission/reception of radio communications/navigation.

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Jet Blast

Jet engine exhaust (thrust stream turbulence).

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Jet Powered Airplane

An aircraft powered by a turbojet or turbofan engine.

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Jet route

A route designated to serve flight operations from 18,000 feet MSL up to and including FL 450.

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Jet stream

A high-velocity narrow stream of winds, usually found near the upper limit of the troposphere, which flows generally from west to east.

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Jg¹K¹

joules per gram Kelvin

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JO

Joint Order

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Judgment

The mental process of recognizing and analyzing all pertinent information in a particular situation, a rational evaluation of alternative actions in response to it, and a timely decision on which action to take.

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