"Stay tuned" for the new digital broadcasting standards. When everything is converted to this next year and the curent analog TV broadcasting signals go away, you'll be able to get different and smaller local broadcast TV antennas and tuners to pick up the digital HDTV ATSC and regular NTSC signals. You may need a converter from digital to analog for old TVs, but it'll make it MUCH easier to get local TV on your boat.
Doug