I spent a few hours, playing with different apps I have, doing various draft models of the Free Trader. It will be a lo-res model when completed. Something that I don't want to spend more than a couple days on. Which meant Hexagon would be used. Ha!
Amapi Pro is great at NURBS. But it is a terrible box-modeler, which I was finding worked better for this kind of object. I had forgotten that Hexagon does boolean cutting, which speeds up the modeling process as well. I'm hoping I don't have to do too much clean-up work on the mesh, once I'm done cutting chunks out of it.
Because I'm old-school, when it comes to modeling Traveller ships, I tend to use only the first drawing made of a ship for reference. I have no idea what the back or bottom of the Free Trader looks like, because there is only the one image of it in The Traveller Book hardcover on page 64. Maybe I have some notes that I took about that back in the day still. Otherwise, creative license as usual.