I have a Humminbird 998c,bought last yr. It has down imaging,and side imaging. Both are unbelievable. With a chip in the unit,and while fishing in the river,I can see objects out to the side, within a set distance. I found large rock piles,moved the cursor over to the pile,than set a waypoint.You can than go back and using your map,go right to the rocks. Last year I was searching for structure,and when I went between to points, about 75 yards apart,I spotted something. I went back slowly and saw a object that was either a duck blind or a dock. You could SEE the 4x4 posts,and the boards that made up the decking.I also have a auto pilot Terrova,and troll in the Bay of Green Bay for walleyes. Now I want to add the i-pilot link,that will let the bow mount motor,and the 998c with the proper chip follow a contour line,or you can set it the stay out from shore at a set distance. Select the depth & speed,and the two units do the rest.Humminbirdfactoryou tlet has a sale on the 998 now,and shipping is free.I know their expensive,but the side,and down imaging is the future in electronics.My 998c is also ready to run the 360 imaging,more money!!! good luck.