SUUNTO AMBIT3 SPORT - Manual (Page 71)

navigation. Press [Start Stop] to select Forwards or [Light Lock]
to select Backwards.
If you selected the first waypoint as the starting point, Suunto
Ambit3 Sport navigates the route forward (from the first to the
last waypoint). If you selected the last waypoint as the starting
point, Suunto Ambit3 Sport navigates the route backwards
(from the last to the first waypoint).
8. If you are using the compass for the first time, you need to
calibrate it (see 3.6.1 Calibrating compass ). After activating the
compass, the watch starts searching for a GPS signal and displays
GPS found after acquiring the signal.
9. Start navigating to the first waypoint on the route. The watch
informs you when you are approaching the waypoint and
automatically starts navigating to the next waypoint on the
route.
10.Before the last waypoint on the route the watch informs you
that you have arrived at your destination.
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