Totally agree with PMC! I too have a 10" Samsung tablet that I bought at Costco. Loaded navionics app on it. I mount it to the side window next to the dash. Blocks nothing in that position. Full GPS with no data plan. Worked great all the way from south sound to desolation Canada. Love the pinch and swipe easy panning. My raymarine is primary but a pain with pushing buttons... So I use it most to monitor the engine room via camera.