Lowrance HDS Gen 3 mapping

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The best option is the precision contour hd maps for Tennessee, if you only fish TN, from C-maps, or Navionics south regional card, but make sure it includes Tn. You can use the depth shading option with Cmap precision hd charts but you have to manually set the shades, under chart options in the sub menu, under custom shading. This video is using a hds live unit, but the set up is the same on depth highlights.
https://www.youtube.com/watch?v=1rhjLutFFqc
 

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