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I haven't owned an airplane with a navaid in it for over 30 years now.
I instantly reached down and dialed in the navaid channel.
If you turn to speak to a passenger or look down to set a navaid while rolling, for example, a swerve is a distinct possibility.
The second scenario assumes that all conventional navaids are still operating but that 80 percent of aircraft will be GPS equipped.
The defining GPS waypoints have satellite-derived coordinates that are co-located with the ground navaids for that approach.
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