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Carbon 12 depth reading #14277701 02/07/22 10:52 PM
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Richard G Offline OP
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I just purchased a Carbon 12 and am using C-Map Discover Chart chip. I was wondering if there is a way to adjust the Chart's depth contour lines to match the actual depth I'm reading while on the water. For example if I look at the chart and I'm sitting on the 20 foot contour line, but the sonar actually reads 15 feet, can I adjust an "offset" to have the chart now show a 15 foot contour line instead?

Thanks....Richard

Last edited by Richard G; 02/07/22 10:53 PM.

Personal Best
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Re: Carbon 12 depth reading [Re: Richard G] #14277719 02/07/22 11:23 PM
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Larry Hutchens Lowrance Pro S Offline
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At this time there is no way to accomplish that on CMap. The only Maps that can do that is Lakemaster and those are brand H only these days as there is a patent for that technology. We would all like to have what you are talking about. Someday.


Lowrance On Water Training
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Lowrance Pro-Staff since 1986 Bass and Crappie Fishing, Hunting, Farming, On Water Training , Exploring Texas and its history.
Re: Carbon 12 depth reading [Re: Richard G] #14277721 02/07/22 11:25 PM
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T Bird Offline
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I don't think there is a "water level offset" feature on the C-Map chips.


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Re: Carbon 12 depth reading [Re: Richard G] #14277752 02/07/22 11:58 PM
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SAdoc Offline
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I use a Navionics with my Elite TI2s and adjust my shallow water setting based on current lake ( 5ft + however many feet below full) then set fishing depth range min and max to whatever depth I want to fish + water depth below full pool ( it’s never above full on any of the south TX lakes).
Is that an option with C-Maps?

Re: Carbon 12 depth reading [Re: Richard G] #14277918 02/08/22 02:48 AM
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Larry Hutchens Lowrance Pro S Offline
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Yes you can do that with Depth Shading on all CMaps either Map Cards or Built in Lowrance Units like the HDS Live and FS Elite. This is not the same thing the OP is asking about but it is a good work around.

Last edited by Larry Hutchens Lowrance Pro S; 02/08/22 02:49 AM.

Lowrance On Water Training
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Lowrance Pro-Staff since 1986 Bass and Crappie Fishing, Hunting, Farming, On Water Training , Exploring Texas and its history.
Re: Carbon 12 depth reading [Re: Richard G] #14278572 02/08/22 08:34 PM
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Richard G Offline OP
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Thanks Larry for the feedback.


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