It doesn't even look good.
Also, after any extended use, the speakers / amps / head unit with the screen would be ruined, and the screen on the inside of the boat hatch would be ruined, too... as would the speakers from the heat.
What a waste of resources //content.invisioncic.com/y282845/emoticons/rolleyes.gif.c1fef805e9d1464d377451cd5bc18bfb.gif