Aluckyguess wrote:

I am getting over 500ft. difference and more.
"Matt Whiting" wrote in message
...

Aluckyguess wrote:

How come the GPS reads a different altitude than the Altimeter?

For many reasons. The main reason is that they derive altitude by two
completely different methods and this inevitably introduces errors. Then
each method has its own inherent errors.

Even two altimeters side by side won't read the same altitude other than
by accident.


Matt



GPS altitude is not accurate. That is why you need to have a baro sensor
included as input to a IFR approved GPS.

--
Regards, Ross
C-172F 180HP
KSWI