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C-Map 4D/Raymarine bottom contour accuracy.

Posted on May 13th, 2016

I talk a lot about the Raymarine fishfinders and how dependable they are, but I have not shared much about the C-Map that are an integral part of my fishfinder.

contours01

Above is a screen-grab of the Niagara Bar from the regular chart, which is accurate, but does not have the detail of the High-Res Bathy Fishing  Chart.

HRB countours

Using C-Map 4D this season I am especially impressed by the accuracy of the depth contour lines. C-Maps calls them High-Res Bathy Fishing Charts, or HRB. If you want extremely accurate detail in your contour lines, C-Map 4D delivers!!

High-Res Bathymetric Fishing Charts

I often fish the mouth of the Niagara River where it’s critical to follow the contour/current lines to effectively catch fish. C-Map helps me do my job well!

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