The Irish Aviation Authority, for instance, recently decided to keep ground-based radio navigation beacons in use because supposedly the more modern satellite-based global positioning system (GPS) has proven so susceptible to jamming in recent years.

Back when my friend Jim (retired Pilot) and I visited Chicago's Approach Control facility, I asked one question "What would happen if GPS went away?", they didn't like the question one bit.

It's really not good the way we're getting rid of ground based navigation aids in the US.