Aeronautical Terms beginning with J

Jamming

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

Jet Blast

Jet engine exhaust (thrust stream turbulence).

Jet Powered Airplane

An aircraft powered by a turbojet or turbofan engine.

Jet route

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

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.

Jettisoning Of External Stores

Airborne release of external stores; e.g., tiptanks, ordnance.

Joint Use Restricted Area

Restricted Area.

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.