I am not real familiar with gps units but have operated a few altimeters over the years. In the Navy we often set our altimeters to read the field elevation rather than what the barometric pressure was. We knew what that was but were not always positive about the accuracy of the pressure setting on the gauge, even when the tower would tell us.
Walt On 8/22/08, Subash <[EMAIL PROTECTED]> wrote: > On Fri, Aug 22, 2008 at 4:40 AM, Mark Roberts <[EMAIL PROTECTED]> wrote: > > I have two hand-held GPS receivers for sale. Both weatherproof hiking units. > > Magellan Explorist 300 > > Has magnetic compass and barometer/pressure altimeter > > Mark, > > just want to know what your experience with the pressure altimeter > with the Explorist 300 was like. i have the garmin vista hcx which > also has a barometric altimeter and during my recent ride, there was > always a fairly huge difference between what the gps device showed and > the 'official' altitude of the places. anything between 100 and 500 ft > difference. there was one particular instance where it went haywire. > we were at the top of a pass called Changla and officially it's > altitude is 17,800 ft. but the gps was showing something like > 20,000-odd ft... > > is this kind of normal behaviour? perhaps it is meant as a purely rough guide? > > regards, subash > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. > -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
