Mxsmanic wrote:


Another problem, not actually part of GPS per se, is moving maps.
Your GPS position may be accurate, but that doesn't guarantee that the
map is accurate. If the mountain on the map is in the wrong place in
relation to its real-world position, having high accuracy from GPS
won't help you. Very often map errors are more of a problem than
errors in the GPS itself.


Once again you don't know what you're talking about. Even if the map
were out of spec a little it doesn't matter as you aren't flying that
close to the mountains if you are IFR. An actual pilot would know that.




Note that WAAS and LAAS will _not_ compensate for either of the above
types of error.

Doesn't matter.





Differential GPS systems like this work best when you
are at exactly the spot used as a reference for the corrections. If
you are anywhere else, the corrections may not be right for your
position. The further away you are from the surveyed reference
position used to generate the corrections, the more likely it is that
your position will be incorrect.

Completely irrelavant for aviation.