Videos Using Sonar Chart to Create your Own Lake Contour Maps September 13, 2019September 14, 2019 The Next Bite Gary Parsons, Lowrance, Lowrance HDS 12 Touch Gen 3 Gary Parsons shows how to create your very own lake contour maps using Lowrance Sonar Chart Live Other Related Posts: Chase Parsons Preferred Active Target Transducer Location… Lowrance Ice pack Watching for Bait on Lowrance Using your Lowrance to Find Fall Walleye Structure