I believe the boat has a broken keel. They are not supposed to hog like that. Note that the stainless steel doublers on the keel are in two parts, split at mid length. I have seen worse. Originally these boats were built with an oak keel and cypress frames and planking. They have modified flat bottoms very much like a Lafitte Skiff. At the end of the season they all head to the shipyards and as they are hauled out you can see torn up rudders, keels, props etc., all indicative of being worked hard in tough locations. Over the years, the owners who do most of the work themselves, add bits and pieces and modifications to protect the hull so it will be better 'next year' . No two are exactly the same after years of mods.
Also in the pics you can see the keel coolers. These boats tend to have single Detroit Diesel 6-71s, with keel cooler and dry stack exhausts. I have seen one or two converted to pleasure boats, they usually show up at the the annual Wooden Boat Festival in Madisonville, La.
