If you want the most out of your chart on your boat while striper fishing on Buggs Island a Navionics Card is the way to go. You will gain some cool feature to help you catch more fish like the safety depth I have mine on 18 feet so everything in white is 18 feet or deeper and everything in blue is 18 feet or shallower. Also you have the depth highlight range lets say you're catching fish between 25-35 feet so everything in white will be between those 2 depths.Click image for larger version. 

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