Mxsmanic wrote in
:

es330td writes:

This brings up an interesting wrinkle then as GPS altitude info is
not dependent on external pressure so pilots must be careful to
ignore that info if available. As stated before, in Class A everyone
sets their altimeter to 29.92 so that as long as everyone is wrong
together everything is okay. Adding GPS info into the mix splits the
groups into two; one that is wrong together at 29.92 and another that
is right at actual altitude.

GPS is too inaccurate for most purposes in vertical positioning,
anyway. It is not designed to determine altitude with a high degree
of accuracy, and can easily be hundreds of feet off.



You#re aan idiot.


Bertie