C Kingsbury wrote:

wrote in message ...


The airlines are NOT making use of WAAS. They have basically told the FAA
to
take WAAS and shove it. Almost no airline aircraft have WAAS. In fact,
all the
aircraft produced prior to the early 1990s don't even have GPS unless they
have
been upgraded (a very expensive upgrade for that type of aircraft
certification
process).


No, but they do use LNAV/VNAV with FMS-derived VNAV. Northwest and a few
others got approval for this a few years back IIRC and that's why those new
descent profiles started popping up on Jepp plates. It's also why the new
approaches are all called RNAV and not GPS.

No doubt about it. Most of them use their GPS-equipped aircraft for LNAV/VNAV
as an ILS backup at major airports and as primary IAPs at a few airports. But,
that has everything to do with GPS and nothing to do with WAAS.