Have you tried to see if a reflection would make this better blended?
You should cause at first glance i thought it was floating.

Yeah I thought it was floating to. I think hes right about the reflection and maybe sharpen up the bottom a little. I really like. Good work.

Light on the hull is from the right, on the superstructure, from the left.

Good eye cmyk46

I agree with CMYK46

Author, I'm not singling you out because this isn't a bad work, but there are SO many entries who don't consider light sources. If they did, they wouldn't get comments like mine.
SO...the question is...not why didn't YOU consider the light source, but why don't THEY?
EDIT: I still like the concept behind your entry, and good luck.

Very very nice conception, it reminds me of a horror movie poster, about ghost ships... But you really have to look at the lighting on the bow and on the hull. Some burn/dodge will help you. And I know that you know that...

Author, long time i did not saw idea like yours...i caught my self how stare 5 minutes in your entry...this great creation is one of my favorite favorites...well done man

Congrats buddy...placing is not important...this is amazing entry