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eTrex Vista C
GPS Navigation
The Altimeter Page
Calibrate Altimeter
Because the eTrex Vista C relies on barometric pressure to determine
elevation, and the pressure at any given elevation can fl uctuate, you can
calibrate the altimeter to increase its accuracy. You must know the eleva-
tion or pressure at your current location. Use a reliable source.
To manually calibrate the altimeter:
1. Use the ROCKER key to access the Options Menu.
2. Highlight the “Calibrate Altimeter” option and press ENTER to
display the Calibration Page.
3. At the message “Do You Know The Correct Elevation?” high-
light the “Yes” button and press ENTER
.
If you don’t know the
elevation, select “No” to use the pressure option. If you don’t
know the pressure, select “No” to use the default GPS eleva
tion.
4. On the number keyboard, use the ROCKER key to enter the
new elevation or pressure; then highlight “OK” and press
ENTER to return to the Altimeter Page.
Data Fields
Two data fi elds support this page and can be programmed to display a
variety of data options: (For defi nitions of these options, see page 81.)
To program a data fi eld:
1. Use the ROCKER key to highlight the desired data fi eld and
then press ENTER to open the data fi eld Options Menu.
2. Use the ROCKER key to move Up or Down the menu to high-
light an option and press ENTER to place it in the data fi eld.
Calibrate using Elevation
Calibrate using Pressure
Altimeter Data Fields
Data Field Options List
eTrex Vista C Owner's Manual Text.indd 25 8/12/2004, 9:16:38 AM