G Farris wrote:

I am aware of that, and I'm certainly not pretending to be "inventing"
something here. Just seems to me that before we went whole-hog GPS we were
seeing smart loran and RNAV boxes that could integrate a number of source
signals. Then we threw it all away to go GPS. I think we could develop a smart
interim solution using a mix of GPS, eLoran (which has come a ong way since we
all turned our backs on it) and traditional graound-based nav aids.

Get rid of the VOR's? Sure. Do it hastily and without forethought? That would
be foolish, in my opinion.

GF


You should forward your views to AOPA. Presently, they are in accord
with the concept being work by the FAA and industry to move to a
performance-based RNAV system where RNP is a requirement. AOPA is also
a proponend of WAAAS to enhance the vertical guidance on RNAV appoaches
since, presently, most light aircraft can't afford the heavy lifting
required for IFR-capable Baro VNAV.

LORAN and Rho-Theta RNAV simply won't provide the accuracy required for
terminal and approach phase RNP.