My brother in law and I went out one evening and the fish finder went completely out. Wouldn't even turn on. We decided to go out any way not knowing the depth we were in or if there were fish in our area. We set our lines at random depths for trolling. Within 15 minutes,we got a massive hit. Ended up pulling in a 16 pound walleye. That trip gave my boat her name which is now "Blind Squirrel".