Question about Garmin eTrex GPS Receiver
Some models have the Barometric Altimeter which needs to be calibrated, and some units do not.
Vertical Accuracy of a properly calibrated Barometric Altimeter is +/- 10'. If you have a unit that uses provides a GPS Elevation only, a +/- 50' vertical solution is pretty standard.
Posted on Jun 24, 2008
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Posted on Jan 02, 2017
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