Yes. It is easy to repeat the display via wifi
But it is just as simple to use an OpenCPN running directly on the tablet in the cockpit.
If you use a repeater, when the station below deck
stops, the repeater stops.
If you use a nav App run on the cockpit toy, when the open below deck
stop, you still have the one in the cockpit, and vice versa.
Plus, you do not need wifi
network when you go the 'independent App' way.