Simrad NSS9 Evo3S Operator's Manual page 134

Using the Link app
Start the Link app to display MFD(s) available for remote control. The list includes both
connected and not connected MFDs.
Select the MFD you want to control. If the MFD is not connected, follow the instructions on
the MFD and on the table/phone to connect.
Managing WiFi connected remotes
You can change the access level and remove the WiFi connected remote controllers.
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Remote control of the MFD| NSS evo3S Operator Manual