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3.3.3. Altitude/Sealevel
In order for the altimeter to function correctly you need to set the reference altitude.
This means that you set an altitude reading that is equal to the real altitude. Set the
reference altitude in a place where you know the altitude, for example, with the help of
a topographical map. Suunto X6hr has a factory set reference altitude that corresponds
to the standard barometric pressure (1013 hPa/29.90inHg at sea level). If you do not
know your current altitude no the correct sea level pressure, you can have an estimate
of your altitude by setting the sea level pressure to 1013hPa/29.90inHg.
In the Weather mode, Altitude is replaced with Sealevel. This function is set in the
same way as Altitude.
To set the reference altitude:
1. In the Function menu, scroll to Altitude with the arrow buttons and press Suunto.
2. With the arrow buttons, set the reference altitude in the field to match the altitude of
your current location and press Suunto. You return to the Function menu.
If you do not know your altitude, you can use the air pressure to help determine the
altitude. To do this, select the 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
You should calibrate the compass if it does not seem to work well, for example, when
it displays the wrong compass bearing or the bearing changes too slowly. You should
