Bob Noel wrote:

[snip]
Has anyone here used the type of equipment I'm mentioning? You should
see the time the thing I use takes to stabilize itself to show the
elevation... you'd comfortably CFIT if you had that in your airplane

yeah, but what is the accuracy of your GPS?
I suspect it is much more accurate than needed for aviation.


Not really Bob. Most building, refinery and pipeline surveys accept a
+/- 0.8 centimeter variation, so it isn't pinpoint like in aircraft, I
think.

Btw, just out of interest - does TCAS use GPS data in some ways too?

Ramapriya