The Sat Flex add-on requires some simple steps to be activated so that you can track the vessel of your choice and access its updated AIS satellite positions.
First you need to ensure that you have added the vessel to one of your fleets. From there, you can access this fleet and then click the Sat Flex button that corresponds to the vessel you want to track.
After that, the satellite tracking has been activated and you can access the available AIS satellite positions of the selected vessel.