Open water swimming relies on GPS to calculate distance. Because GPS signals do
not travel underwater, the watch needs to come out of the water periodically, such as
with the freestyle stroke, to get a GPS fix.
These are challenging conditions for GPS, so it is important that you have a strong
GPS signal before you jump in the water. To ensure good GPS, you should:
•
Connect your watch to Wifi to optimize your GPS with the latest satellite orbit data.
•
Wait at least three minutes before starting your swim after you select an open
water swimming sport mode and a GPS signal is acquired. This gives the GPS time
to establish strong positioning.
Suunto 7
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