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Suunto Ambit3 Vertical User Guide - 1.1


FusedAltiTM provides an altitude reading that is a combination of GPS and barometric altitude. It minimizes the effect of temporary and offset errors in the final altitude reading.


By default, altitude is measured with FusedAlti during exercises that use GPS and during navigation. When GPS is switched off, altitude is measured with the barometric sensor.

When the device is in time mode, you can search a new reference for barometric altitude with FusedAlti. This activates the GPS for a maximum of 15 minutes.

To search for a new altitude reference value with FusedAlti:

  1. Keep Next pressed to enter the options menu.
  2. Scroll to ALTITUDE with Light Lock and enter with Next.
  3. Scroll to Auto adjust with Light Lock and press Next to activate. GPS is switched on and the device starts calculating altitude based on FusedAlti.

In good conditions it takes 4 – 12 minutes for FusedAlti to activate. During that time, Suunto Ambit3 Vertical shows barometric altitude and ~ is shown with the altitude reading to indicate that the altitude may not be correct.