The only split screen functionality you could potentially lose is when you are in navigation mode and you press the button that looks like two interleaved boxes that switches you to the radio view mode. With splitscreen on you would see the radio information in the left half of the window and still see navigational information on the right side of the window. If you lose some functionality it will cause the radio information to be displayed on the full screen.

All other navigation split screen functionality will continue to work as normal.

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