A quick overview. Some people look at this and say "what are you talking about?"
Look at Side Imaging like this:
This is what the image looks like as you are looking at your unit:

Put the black on top by tilting your head to the right.
-Then it should look like this:

In the picture above, think of it this way, your 50 ft away from the bridge floating on the surface and you take a camera and go under water and take a pic of the bridge. The blackish lines paralleling the pylons are the sonar shadow.
Ill do it again with this bridge picture:
This is what you see while in the boat

Now Ill split the screens to make it readable. I distorted part of it to less confuse you.

Now it looks like you are on the bottom looking at the bridge in top and bottom pic.
bottom right is a zoom in.
