It's not just the FAA, wolfie. It is the entire aviation industry
working with the FAA in performance-based navigation concepts.

Most of the serious transport aircraft have, or will have, very accurate
IR systems in addition to GPS, thus they are not single thread aircraft.

ILS won't be decommissioned for many, many years.

VOR triangulation is so inaccurate that it has no value in today's RNAV
terminal procedures. DME can work, but only where the geometry is good.
All modern transport aircraft can degrade to DME/DME updating and
there is no plan to stop placing that capability in serious aircraft.

WolfRat wrote:
The FAA is marching toward sole dependence on GPS. The FAA
engineers and controllers are screaming from the
mountaintops PLEASE do not single thread North American
airspace navigation on satellite only. Yes GPS is awesome.
Yes GPS has and will change our lives. But the signal is
small and vulnerable. From an infrastructure perspective all
you have to do is jam the down link. IF we were GPS only in
North American Air Traffic control the Chinese or
sophisticated internal terrorism could shut down the system.

High Power GPS jammers energized at coordinated locations
near big cities. Mobile jammers in vans. GPS jammers and
Spoofers on balloons launched up wind from major cities.

We would come to our knees. It would take days to sort out
the jammer locations while our entire economy is crippled.

GPS can be PRIMARY But!!!!!!!!!!!!!! we should have a
secondary Robust ground network for Navigation and
Communication of aircraft, military, trucks and ships and
trains and people.

Use an integrated GPS/VOR/DME/LORAN concept. All GPS
receivers sold after 2010 everywhere should be capable of
picking up all four systems. FOUR separate frequencies for
more spectrum jamming difficulty. Keep ILS at major airports.