I started out the ship as nurbs (used mostly curves, birail and extrude). As I got the rough shapes done in nurbs I converted it to a low poly object and sew the pieces together and added the more "detailed" stuff there. Then I finally converted it to a SubD model where I added some full and partial creases.

It's still very rough and I got bored modeling it. Went back to the ocean stuff. I'm going to continue the ship sooner or later though...