Humminbird AUTOCHART ZERO LINE Electronic Chart

Humminbird AUTOCHART ZERO LINE Electronic Chart. with these all-important Zero Lines as your foundation you can begin creating your own accurate and detailed maps of any fishing spot even where contour coverage doesnt exist. Anglers can purchase Zero Line Map Cards to view the Autochart-created maps on multiple Humminbird units. for those with the Autochart PC program simply export the map from the program to the extra Zero Line Map Card and youll have multiple charts of your favorite fishing sp