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Posts: 183
| Navionics has the feature called Sonar Charts available on select sonars, create your own lake map and or improve your present map quick and easy. remember that you are not giving up waypoints just improving mapping, lets say you log sonar improve the mapping and afterwords you are studying your lake map and you see a point, hump, breakline that you did not know existed before and you find fish on that piece of structure! Sounds like a bonus to me.
The bottom set is a real set of upgrades before, track log and after or SonarCharts
http://www.navionics.com/en/navionics-plus
Here is a link to how easy it is to do...
http://www.navionics.com/sites/www.n...ogs_Upload.pdf
Edited by kirth 7/23/2013 11:06 AM
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