On Mar 9, 9:15*pm, Brad wrote:
You almost start to feel like glider pilots are a bunch of cheaters
that will stop at nothing to win or get a badge: they need an AH in
their panels so they can cloud fly, or they use secret apps on their I-
phones that they'll load once airborne.........now they're gonna
jigger their GPS trace to get extra altitude................jeez, I'm
glad I'm just a lowly blue circle OLC pilot!

Well, how would you suggest we deal with the fact that a 1000 meter
gain measured by the GPS may physically place the glider either higher
or lower than a 1000 meter gain measured by a pressure altimeter on
the same day? We traditionally measured height and gain by using
pressure differentials mapped to an abstract model of the atmosphere,
allowing both methods of measurement requires some sort of
compromise...

Marc