Yup, and nope. My Dad's Garmin GPSIII works great on airplanes. Some commercial pilots buy handheld GPS units to back up the equipment on the aircraft.
- Chris
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"There is no worse tyranny than to force a man to pay for what he does not want merely because you think it would be good for him." – Robert Heinlein
"Contrary to popular belief, your vote does not matter, and you cannot make a difference." - Bob Murphy, "Picking Neither of Two Evils"
My PGP Public Key
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