SUUNTO X6OG - Manual (Page 30)

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3. With the arrow buttons, set the reference altitude in the field to match the altitude of
you current location and press Suunto. You return to the function menu.
If you do not know the altitude of the place you are in, you can use the air pressure
to help determine the altitude. To do this, move into Weather mode and set the current
sea level air pressure. You can find out the sea level air pressure, for example, from
the airport, weather station or Internet weather pages.
3.3.4. Compass
The compass menu includes functions for either calibrating the compass or setting its
declination.
Calibrating the compass
As a basic rule, you should calibrate the compass if it does not seem to work well, for
example, when it displays the wrong compass heading or the heading changes too
slowly. You should also calibrate the compass after replacing the Suunto X6 battery.
Strong electromagnetic fields, such as electric lines, loudspeakers and magnets, can
affect the compass calibration. Therefore it is advisable to calibrate the compass if
your Suunto X6 has been exposed to these fields.
It is also recommended to calibrate the compass before a long trip, such as a hiking trip.
NOTE: Calibrate the compass before using it for the first time, and before you leave
for an extended outdoor activity.
NOTE: Remember to hold the Suunto X6 level during the calibration.
The calibration includes the following phases:
1. To access the function menu, press
Suunto in the main display.
2. In the function menu, scroll to Compass with the arrow buttons and press Suunto.