The problem with trying to measure trail distance in the field with civilian GPS (handheld GPS not corrected by differential GPS signals) has been that GPS has not
Month: May 2013
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Garmin eTrex 10, 20, and 30
All three eTrex models are waterproof and feature paperless geocaching. Both have basemaps- the eTrex 20 and 30 adds color screens, a micro-SD card slot, and the ability