Raymarine AR200 Installation Instructions Manual page 50

To choose the AR200 as your preferred source for GNSS (GPS) position data, select Raymarine
AR200 GNSS from the list of devices, and then select Always use this device from the Pop-over
menu. This will make the AR200 the preferred source for GNSS (GPS) position data.
Once selected, a tick is placed in the Preferred column and the Manual selection toggle switch will be
enabled. If your AR200 has a position fix, position accuracy is displayed in the Value in use column.
When a valid position fix is achieved, your vessel's latitude and longitude position is displayed
on the Homescreen.