Re: fish finder
First thing, <span style="text-decoration: underline">TURN OFF</span> the fish ID. Its a waste of time looking at fish symbols on the screen. Some depth finders actually look for the fish's air bladder, then sets the size symbol accordingly. Learn to set up the graph, play with the sensitivity and other settings.
Second, its a depth finder. My graphs are 20 years old and still work. After playing around all these years, I can still get some good arches. Not all the time but I do get some. I use the one graph for ice fishing as well. It can be set up to even show you when the bait is off the hook. This is done by playing around with the units sensitivity, and learning about the size of the echo it returns.