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20 eTrex Owner’s Manual
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Calibrating the Barometric
Altimeter
You can manually calibrate the
barometric altimeter if you know
the correct elevation or the correct
barometric pressure.
1. Go to a location where the elevation
or barometric pressure is known.
2. Select Elevation Plot > menu >
Calibrate Altimeter.
3. Follow the on-screen instructions.
Trip Computer
The trip computer displays your current
speed, average speed, maximum
speed, trip odometer, and other helpful
statistics.
To customize the trip computer, see
page 28.
Resetting the Trip Data
For accurate information, reset the trip
information before beginning a trip.
Select Trip Computer > menu >
Reset > Reset Trip Data > Yes.
All of the trip computer values are
set to zero.