[GeoStL] Re: GPSr use in commercial aircraft
- From: Greg Ponder <thehairyhillbilly@xxxxxxxxx>
- To: geocaching@xxxxxxxxxxxxx
- Date: Tue, 19 Aug 2003 18:43:50 -0700 (PDT)
If the crew comes back asking for second opinions on the altitude, you'd better
hope that gpsr works really well!
Glenn <Glenn@xxxxxxxxxx> wrote:-
which one is correct??
glenn
At 06:04 PM 8/19/2003, Jeff Tynan wrote:
>One other detail about gps altitude readings in commercial aircraft.
>Whenever an aircraft is above 18000ft(in the US), the altimeter is set to
>a standard barometric pressure setting of 29.92 inches of mercury. Your
>gps could indicate an altitude which is significantly different from the
>altitude the crew is reading.
>
>Jeff
>
>On Tuesday, Aug 19, 2003, at 17:41 US/Central, Budlvr40@xxxxxxx wrote:
>
>>I was wondering about that also! I could only assume my unit got the
>>altitude from a 3D gps fix, and not barometric press. (76Map s)
>
----------------
Glenn
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