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Suunto 9 User Guide - 2.1

Altimeter

Suunto 9 uses barometric pressure to measure altitude. To get accurate readings, you need to define an altitude reference point. This can be your current elevation if you know the exact value. Alternatively, you can use FusedAlti (see FusedAlti) to set your reference point automatically.

Set your reference point from the settings under Outdoor.

Outdoor settings

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