Fins to the left, Fins to right, StructureScan® HD and StructureMap™ are the only game in town . . . No, this video does not have Jimmy Buffet vocals. But, we are in the Florida Keys for this demonstration of built-in StructureScan HD sonar imaging on the revolutionary HDS Gen 3 multifucntion display. See how to interpret StructureScan HD (and DownScan Imaging™) in relation to structure and how to find fish-holding near to structure. See the benefits of using the clever StructureScan HD chart overlay we call StructureMap.