Message posted by Duke on September 30, 2019 at 8:19:58 PST:

From what I can find, USAF did not replace the nav aids C-140 calibration aircraft when they were retired. I would assume they either contract that out to a private business or the FAA.

In Reply to: Re: Private aircraft from Groom Lake? posted by Jason S on September 30, 2019 at 7:40:22 PST:

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