Larry Dighera writes:

The FAA has published a list of 736 NDB and VOR/DME instrument
approaches (PDF:

Well, the NDB stations should disappear. VOR, no opinion, but they all
gotta go at some point.

As for solar flares, etc. OK, I'll take your word for it. Perhaps, with
advances in semiconductor sensors, relatively cheap inertial
navigation can be constanly online, so a GPS outage on final (and
elsewhere) need not be a catastrophe.

The agency says it can't afford to keep expanding satellite-based services
while maintaining the current ground-based infrastructure.

Even as it expands its ground stations: the many ADSB stations.

--
Never interrupt your enemy when he is making a mistake.
~ Napoleon

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