Quote Originally Posted by apersohn17 View Post
Check this link out. Talks about the"dead zone".

Use your fish finder to locate the structure that holds fish.
And I feel this sort of reinforces what I said. This author states: "A 2 dimensional display can only show the shallowest reading it is receiving back." and his illustration shows a boat sitting over a dropoff, but not showing the fish that are below the "shallowest reading". But remember this is NOT a static picture. This boat is moving from left to right. The transducer will go from shallow to deep as the boat moves, so the "shallowest reading" will gradually go deeper and deeper, and then start showing those fish on the downslope, altho the fish would probably form even less of an arch than if the boat were moving from deep to shallow as in Rickie's illustration. If the boat in the illustration remains in ONE place, then it will show a flat bottom with no fish.