Humminbird™ color combo GPS/Sonar units come preloaded with the updated software to run LakeMaster™ GPS charts. Simply insert the card in the slot and power on the unit. Some older Humminbird GPS/Sonar models may require a software download. Accuracy and detail give anglers using LakeMaster™ GPS Map Charts the best high-definition hydrographic maps on the market. More coverage means more opportunity for catching fish on your favorite bodies of water. All 2013 LakeMaster editions will be compatible with i-Pilot™ Link™ for the "Follow the Contour" feature.
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