Your watch has built-in GPS (GNSS) that provides speed, pace, distance and altitude measurement for a range of outdoor sports, and allows you to see your route on map in the Flow app and web service after your session.
You can change the satellite navigation system your watch uses in addition to GPS. The setting is located on your watch in General settings > Positioning satellites. You can choose GPS + GLONASS, GPS + Galileo or GPS + QZSS. The default setting is GPS + GLONASS. These options give you the possibility to test different satellite navigation systems and find out if they can give you improved performance in areas covered by them.
GPS + GLONASS
GLONASS is a Russian global satellite navigation system. It is the default setting as its global satellite visibility and reliability is the best of these three, and in general we recommend using it.
GPS + Galileo
Galileo is a global navigation satellite system created by the European Union. It is still under development and is estimated to be ready by the end of 2021.
GPS + QZSS
QZSS is a four-satellite regional time transfer system and a satellite-based augmentation system developed to enhance GPS in the Asia-Oceania regions, with a focus on Japan.
The watch uses Assisted GPS (A-GPS) to acquire a fast satellite fix and improve positioning performance during training. The A-GPS data tells your watch the predicted positions of the GPS, Glonass, Galileo and QZSS satellites. This way the watch knows where to search for the satellites and thus makes defining your location faster.
The A-GPS data updates once a day. The latest A-GPS data file is automatically updated to your watch each time you sync it with the Flow web service via FlowSync software or via the Flow app.
A-GPS expiry date
The A-GPS data file is valid for up to 14 days. Positioning accuracy is relatively high during the first three days, and progressively decreases during the remaining days. Regular updates help to ensure a high level of positioning accuracy.
You can check the expiry date for the current A-GPS data file from your watch. Go to Settings > General settings > About your watch > Assisted GPS expires. If the data file has expired, sync your watch with the Flow web service via FlowSync software or with the Flow app to update A-GPS data.
Once the A-GPS data file has expired, more time may be required for acquiring your current position.
For best GPS performance, wear the watch on your wrist with the display facing up. Due to the location of the GPS antenna on the watch, it is not recommended to wear it with the display on the underside of your wrist. When wearing it on the handlebars of a bike, make sure the display is facing up.