About the render, it looks unrealistic. No offence, but it needs rework. The sky colour influences the water colour. However I would recommend keeping the sky clear, change the sun position, make it look dramatic, change the colour of the water greenish. Disable emitters, and make the target SSP 400-1000.

Otherwise, nice. The rope would need a little work though, I love the new paint on the battleship, however the black line should be at the water line. Your hull looks superb, but the top needs work. Try smoothing things, add more curves, make it look complicated, and not like a bunch of blocks. For the front and back cannons, use slabs for the barrels and use stone brick to get a smoother look.
I hope you take no offence from my advice, but after seeing those people bullying you, on your USS Atlantic, I really want to help you improve. Hope this helps.