This is good. One of your best so far I think.
You planned it, thought about it, set the camera up, focused on the life preserver and made a really good effort.
The post processing can be refined a bit, but good work.
Colour, and maybe colour balance has the rope looking blue/magenta, and its likely a white rope thats underexposed a bit, so hint of blue would be ok.
Be careful around the area where you removed that metal bit, - theres a bright area that draws attention to it, but a good idea to remove it.
I would clone out the bright spot at the bottom, might be lens flare, and Ive loaded a mod with a bit more space added to the top to place that horizon on a third.
The water drops on the life buoy are a really nice element here too.
Well done overall.
The mod has a different colour tone, added the top space, cropped space off the left, and sharpened the water drops quite a bit to get them to shine.