Thank you for the reply....... The image of the backs of these creeks actually show up sometime, then if i zoom out or in the creek disappears and it will just randomly re-appear everyonce in awhile. I never have this problem when i'm on the main lake....it always occurs when i get back into a creek. I will be buying a navionics chip very soon so i wont have the problem anymore, I've just always wondered why it does it. Thanks again Greg