What type of unit do you have? I have a Lowrance 3G radar on my boat and love it. I got the point one atenna with the standard mapping chip and I can overlay the radar on the chart. It is very nice for running at night. What you will see depends on weather conditions. If the wind is not blowing to bad and I can turn of sea clutter I can pick up crab traps and such well before I can see them with my eyes,but you loose that with seas. Now for night running I know if there is any boats out there weather they hav lights on at night or not. I can also see boats around blind cornors with it as well as pillons and PVC pipes and such. So it does have its advantages, with it and the GPS there is not many places I wont go to try out. You will still have to limit your speed at night if you are unfamiluar with the area but you will know what is out there.
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