hi Quicksilver, I’ve had a marine band radio for the last 7 or so years. it is handy when fishing with friends or a friendly fishing club, like mine, we can talk during the day, and help each other on what’s working and what’s not. Most radios now also have built in 9 National Weather service NOAA radio channels, no matter where you are you can usually get at least one channel. if some bad looking weather is moving, my first move is to my radio to listen the NWS. it is a real safety item to have on board. also on big water, it might be a lifesaver, at least someone out there will have a radio. on shiping channels and Great Lakes the Coast Guard monitors certain freqs, and are always on 16. Antenna come in different lenths. trans and receive is line of sight. on water the horizon is 7 miles out, so if you need to reach much beyond that often, you’d probably need an 8 ft antenna, most situations 4 ft is plenty good enough. hope that helps. Jack.