I said I would not tell everyone how stupid I am , but hear goes. May keep someone from making the same dumb move. Went Thursday, mostly to play with my sonar unit. Got in boat and pushed ENTER, no responce. After several more tries And cleaning battery contacts, fuses,etc.. The great dummy realized you have to push the power button to get it to come on. After reading Cane pole's comments regarding sound travel in water (1100fps)and wondering why I didn't see many fish, I realized in shallow water(less than 11')my trolling motor/ outboard was making to much noise. Please don't be like me. Just because you paid a lot of money for a nice sonar, doesn't mean it can take place of the space between your ears, Every body have a good laugh, I have.