This project shows and example of creating a boat hull using Fusion 360.

I've included some details (description below and design files) as to how I create the "rails" for the lofts. I used the Loft to under Surface Modelling tools and Thicken to create the solid model.

You might say, "why not use Solid modelling to create the loft then shell to hollow it out?" Try it and see. That tight corner at the bow will probably limit how thick it can be and often leads to cryptic errors. Also, this will make all the surfaces the same thickness which you might not want.