Suunto M9_en.p65 Instruction Manual page 30

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To calibrate the compass:
1. In the Set menu scroll to Calibrate and short press Enter .
2. Hold the Suunto M9 horizontally level and rotate it 360
degrees for 30 seconds.
3. Hold the Suunto M9 vertically level and rotate it 360 de-
grees for 30 seconds.
4. When the calibration is finished, you return to the Set
menu.