Not sure about salt water, but for bass fishing I've found spots going this route. Mostly main lake ridges and really visible stuff. If you can adjust time settings to view when the water was lowest or really clear that helps too. Might have to have google earth for that though. For example, I would always fish a big shallow flat and catch fish regularly, but doing this and finding a ditch that ran through the flat, a decent spot turned into an awesome one. I would think a navionics chip would show these channels also?
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