And if you see.... all those planes are decked out with all of the following.
1)GPS MMR(multi mode reciever)
2)Better RNP(required nav performance)
3)RNAV approach able
4)Possibility of further WAAS(Wide area augmentation system)/LPV(loc precision w/ vertical guidance) and LAAS(local area augmentation system) upgrades.
5)ASD-B(Automatic dependent surveillance-broadcast)
Another is adding Pegasus FMCs w/ GPS MMR making them capable of RNP and RNAV(GPS) and SAAAR(special aircraft and aircrew authorization required) (RNP) approaches.
I got a feeling most stuff is around the FMC and adding GPS and maybe WAAS if the airline has the money for WAAS GPS. (Look at my profile pic) Its a 777 Pegasus FMC, but that is the new model that can support everything except for WASS/LPV. (787 FMC has WAAS/LPV and RNP.1)
The 757/767 is old technology..... this is just to bring the planes into the NEW
FAA . The FAAs new idea is to.... make new things(enroute, terminal, etc.) that can be used by most current avionics with some small upgrades.
the 757/767 could do 0/0 if it wanted if it could park on the runway.
The CATs are more airline dependent and what the airline can tain for the flight crews..... not just airplane dependent.
As I said, the NEW FAA w/ all their HAR(high alt redesign) and starting to dump NDBs, VORs, and ILS instead for FMC performance based things.
The upgrades have nothing to do with ILS..... it has to do with next Gen RNAV and that fact that the 757/767 has many good years left, but not if there is no ground based things for the plane to fly off of.
757/767 is from the late 70s early 80s and besides upgrades to the FMC(like this new one) has not changed much.
WAAS/LPV w/ proper lighting can be as good as a CATI ILS. There is also workings for the future for an actual GPS/GNSS landing system.
Right now its mostly GA with RNP approaches showing up in commercial aviation...... but these airlines are gearing for the future.
I called ABX one day and they have RNAV(GPS) and maybe (RNP) approach approval right now with those new panels on some of their 762s.
Hope I helped.
[Edited 2008-06-16 13:57:23]