"Richard Kaplan" wrote in message
s.com...


"Tarver Engineering" wrote in message
...

I expect they will be disapointed if they are expecting anything better
than
the VNAV capabilities listed for the CNX-80. Note that LAAS is defunded
and
therefore WAAS will not be getting to CAT III.

Who is suggesting flying a Cat III approach in a piston single-engine
airplane?

All I am saying is that I fully expect the Garmin 400/500 series and the
CNX-80 to be capable of flying RNAV approaches to VNAV/LNAV minimums and
to
fly LPV approaches as well by the end of the year.

Do you not agree this should be possible by the end of the year?

That will depend on the airport, but perhaps FAA can speed that process up.

Do you not agree this will be an improvement over current GPS
capabilities?

I would not credit WAAS with much of it. The 5 sample GPS engine and the
pressure altitude data are much more important to the VNAV. Getting from
7.2 meters to 3.6 meters longitudinal accuracy does not give a lot of extra
capability. Adding the pressure altitude gets us the abreviated TAWS data
base to pump the probabilities.

The CNX-80 is a response to the desire for a GPS VNAV by rai posters. I do
not blame Garmin for buying UPSAT and porting the technology and I believe
more pilot information is safer, as some are going anyway.