Billy I have the 798 csi Humminbird. You can view structure 100' to the left and right of you. But, you have to be moving to read it. I would recommend the 900 models because the screen is bigger and easier to see. Here are some of the photos I took of mine.
http://teammalibu.ning.com/profiles/...ealth-14-kayak
http://www.allkayakfishing.com/forum...ead.php?t=1288