Bill Wexler's Dog Pound Message Board

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Non-Tech : Bill Wexler's Dog Pound

REFR 1.590

-0.6%

10:24 AM EST

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To: Bill Wexler who wrote (3140)	8/19/1999 5:48:00 PM
From: BelowTheCrowd	Read Replies (1) of 10293

Bill, Some GPS units doubtlessly will fail, at least temporarily. Mostly it'll be the cheap handheld ones used for hiking/etc. Any certified aviation unit is required to have updates done, so no issue there. Besides, most commercial aircraft don't even have GPS. Airlines are very stingy about upgrading avionics, and a GPS addition to the Flight Management System on most airliners is a 100K+ effort. Even on the newer ones, which have been delivered with GPS, there is no approval for GPS as "sole means of navigation." The airplane must have alternate navigation systems in place. And of course it's worth mentioning that GPS cannot be used for precision approaches, which are the most critical piece of the flight. The technology just isn't there yet... mg

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