Here's a question that no one at my work has been able to answer. The built in flotation on my boat, it is designed to keep the boat just below the surface in case things go bad, as I assume this is true for most boats. My question is, it that just for the weight of the bare bones hull. Does that include the weight of the outboard? How about 3 batteries and a trilling motor? See where I'm going with this? HOW do they, the manufacturers, determine at what point the boat will go all the way to the bottom. For what's it's worth, I have a 1860 roughneck. Curious to hear what you have to say.