just remember it isnt a true 3D program it is more of a polygon modelling program rather than a parasolid. so though you can make some nice looking stuff its would be more for 3D modelling and looks rather than really useful for engineering a ship. probably be hard to get a good dxf or any type file for printing plans and parts but I havent played with it enough to say whether you can or cannot do it. just my experience with polygon modelling software like 3D max etc.
I tried using SketchUp 17 for a year, more or less, and I got completely discouraged. I bought a book fo it that has step-by-step training for woodworkers, but it seems that everything I tried to do wouldn't work right, even with the special add-ons for things like biezer curves, polygons with angled sides, etc.
I finally gave up and went back to 2D AutoSketch that I have used since about 1992. Less than ideal for some views, but extremely reliable for the things that it can do.