I have a garmin echomap uhd 73sv that came with lake maps loaded onto in that I bought at bass pro last year. I find that the depth chart is equally as important as marking fish. I can color code the depth so if I’m fishing in 40-60 ft of water. It shows up as dark blue on the map so I just keep the boat trolling in the dark blue, color coding depths is fully customizable so it’s great for trolling. I love it for my weekend fishing with the kids on my 18’ center console
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