We monitored the screen as we motored up the river channel, studying the underwater topography on both sides of the boat. Larry Hutchens split his Lowrance HDS-7 screen to three, sometimes four, windows, and toggled between side scan, structure scan, chirp sonar, GPS with map chart and down scan, eventually settling on the side-scan feature. The depth ranged between 8 and 60 feet while the scan searched for fish 100 feet to either side of the boat. There were a lot of fish on the screen—too many to ignore.
Hutchens cut the motor and threw his crankbait toward a sandbar. He reeled hard, the plug dove deep and the rod bent over. Before long, the yellow flanks of a walleye flashed
