Quote Originally Posted by CrappiePappy View Post
Yeah, I get the distance not depth translation of the ping (I have a DI unit). That's exactly why I don't understand why there is no dock pole image above the fish. Even a ghost image appearing would make more sense than no return signal image at all.

All I'm saying is ... say the transducer is about 1ft under the water, and it's supposed to be shooting out a sonar ping at 90deg/side ... then why would it not show the dock post above the ball of fish, even if it only reached to within one foot of the centerline ?? It shows fish higher in the water column than the dock post ... and the dock post is a more solid object, so it should reflect a good image. I can understand the fish ball blocking out part of the dock post return signal, but not why the dock post return signal isn't being picked up "above" the fish ball, which tops out at 10' "deep" (in the screen image) but which is actually 10' from the transducer. The dock posts are not more than 50' away from the transducer, else they wouldn't show anywhere in the screen image .... the sonar ping is picking up the bottom half of the posts, so why not the top half ?? Wouldn't the SI ping pick up fish just below the surface, as long as they were within the set distance range .... even though they would appear to be as "deep" as they were actually distant from the transducer ??

... cp
It's not pinging at 90 degrees.