Suunto TRAVERSE series User Manual page 28

4. Scroll to Compass with [Light] and select with [Next].
5. Press [Next] to select Calibration.
3.7.2 Setting declination
To ensure correct compass readings, set an accurate declination
value.
Paper maps point to true north. Compasses, however, point to
magnetic north – a region above the Earth where the Earth's
magnetic fields pull. Because magnetic North and true North are not
at the same location, you must set the declination on your compass.
The angle in between magnetic and true north is your declination.
The declination value appears on most maps. The location of magnetic
north changes yearly, so the most accurate and up-to-date declination
value can be obtained from the internet (for example www.magnetic-
declination.com).
Orienteering maps, however, are drawn in relation to magnetic north.
This means that when you are using orienteering maps you need to
turn the declination correction off by setting the declination value to 0
degrees.
To set the declination value:
1. Keep [Next] pressed to enter the options menu.
2. Scroll to NAVIGATION with
3. Scroll to Settings with [Light] and select with [Next].
4. Scroll to Compass with [Light] and select with [Next].
5. Scroll to Declination with [Light] and select with [Next].
6. Turn the declination off by selecting --, or select W (west) or E
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[Light] and select with [Next].