Nice concept. The image appears too greyish - I've had the same problem on photographing seascapes on overcast days. Maybe try playing with levels some? Or use a polarizer?
I love the tones in this shot and the sailboat heading out at dawn..maybe it's because when I was young we spent many, many years sailing...this brings back memories...well done.
Nice! But the colors are a little flat. Perhaps try adjusting contrast/curves/levels? Or convert it into a B&W? All in all, a good shot! I like how the boat and its mast stands out.
This seems a tad dull to me. Maybe due to the overcast sky or time of day. The compositioin is quite good. Maybe if you could beef up the blue of the water, and the contrast, it might have a bit more pizzazz. I hope you found this helpful.