Join J21?

Thu Aug 24, 2000 2:01 pm

First of all let me just say that I am very glad for this forum. All of you people out here answering all these questions is just wonderful. I for one am very grateful.

Ok, on with my question.
Listening to ATC on my scanner, I sometimes here this: NWA 353 climb and maintain 17,000 and join J21. What is J21? I have heard some people say it has to do with the jet stream. If that is the case, can someone be a little more discriptive about what that means? Thank you in advance.

Minneapolis, MN
aaron atp
Posts: 517
Joined: Sun Mar 19, 2000 1:17 pm

RE: Join J21?

Thu Aug 24, 2000 3:12 pm

a Jet Route... it's a high altitude airway.

They are plotted on high altitude enroute charts for use between FL180 and FL450 and are usually defined using radials between HIGH class VOR's.

Posts: 6085
Joined: Fri Sep 17, 1999 7:43 am

RE: Join J21?

Mon Aug 28, 2000 11:22 pm

Three NOAA high-altitude charts cover the US; they cost $4.10 apiece. You can see a sample (of the Chicago area) at

J21 runs from the Duluth VOR to Gopher to Omaha and on down to Laredo, or maybe beyond.

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