Garmin eTrex 20 User Manual

18 owner’s manual for use with models 10, 20, 30
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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 26.
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.

Garmin eTrex 20 Specifications

General

Outdoor (hiking, trekking)	Yes
Marine (chartplotters, sounders)	No
Routes quantity	200
Number of waypoints	2000
Form factor	Handheld
Display diagonal	2.2 \
Display resolution	176 x 220 pixels
Display number of colors	65536 colors
Display size (HxV) (imperial)	1.7 x 1.4 \
Internal memory	1740 MB
USB 2.0 ports quantity	1
Battery type	AA
Battery life (max)	25 h
Battery technology	Nickel-Metal Hydride (NiMH)
Number of batteries supported	2

Weight and Dimensions

Depth	33 mm
Width	54 mm
Height	103 mm
Weight	141.7 g