On Sun, 16 Apr 2006 14:37:53 -0500, Chris W wrote:

It is my understanding that even if a GPS is reading perfectly and your
standard altimeter is reading perfectly even on a standard day that the
2 values will not be the same

Mine generally read within 50-100 feet of one another. However, I
rarely fly above 3,500 feet. (Altimeter is 60 years old, assuming same
age as airplane.)


-- all the best, Dan Ford

email: usenet AT danford DOT net

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