Suunto AMBIT2 2.0 User Manual page 119

NOTE: POWER OFF is a low power state. Connect the USB cable
(with power source) to wake up the watch. The initial setup wizard
starts. However, prior values are not erased, so you just need to
confirm each step.
NOTE: The watch switches to power saving mode when it is
static for 10 minutes. The watch re-activates when moved.
NOTE: Service menu content is subject to change without notice
during updates.
Resetting GPS
In case the GPS unit cannot find a signal, you can reset GPS data in
the service menu.
To reset GPS:
1. In the service menu, scroll to ACTION with [Light Lock] and enter
with [Next].
2. Press [Light Lock] to scroll to GPS reset and enter with [Next].
3. Press [Start Stop] to confirm GPS reset, or press [Light Lock] to
cancel.
NOTE: Resetting GPS resets GPS data, compass calibration values
and recovery time. Saved logs are not removed.
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