Bill Ricker wrote:
all barometric altimeters must be calibrated to known altitude or known sealevel pressure frequently for any absolute accuracy.
... and (at least with my eTrex Vista) the compass needs recalibrating by turning it around twice after a battery change.
Cheers, Andy _______________________________________________ newbies mailing list [email protected] http://lists.openstreetmap.org/listinfo/newbies
