Garmin eTrex 30 User Manual

20 eTrex Owner’s Manual
Navigation
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.

Garmin eTrex 30 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