I had to repost on this thread. I just finished a conversation on the forum with Shaun Russell. He is a tournament fisherman and he runs a Bonafide SS127. That Hull design is very specific in that is resembles a pontoon style hull. It has two, very pronounced pontoons and a recessed around in the middle of the boat. His Side Imaging unit is mounted to the bottom side of the removable locator pod which is very much protected by the pontoon sides and he reports great side scanning capabilities when his locator is NOT below the bottom of the hull.
So now, I am really confused and what I thought that I knew, I still need to learn more.
Note: his transducer is in the water, not shooting through the hull from the inside of the boat, but not below the pontoons. Interesting.
Many go fishing all of their lives without knowing that it is not the fish that they are after. Henry David Thoreau