awesome colour sense.
You have some really consistant machine designs, which is great, and your lighting, is really effective, I like it.
A problem, though, is that I can only see turbines on the ship, yet it appears to be floating on the spot, with no disturbances in the waters below...
Also check your perspectives constantly when contructing things, it appears that the ship is a little wonky, especially in contrast to the shadow.
What I can say is that you should put some time into understanding how machines work. Knowing how the actual internal mechanisms work, no matter how fantastic, makes the outer facade so much more believable.