Trying out a lens I bought last year I did shoot those jack-up vessels in the harbour. On the waterline they're a sort of eye catcher. I hardly used this lens for it's to big and I need a tripod with it.
At the moment 4 of those vessels are laying here, with together 16 "legs".
Three of them you see from the front, the fourth is laying different.
The whether was quit foggy.
D700, 80-200 af-s 2.8
A crop from another position. You can see the vessel are out of the water. They have 4 ship screws.
A few years ago I toke next one. Different gear.
I didn't resize the images, so when viewing at 100% it is 100%. I did so to make it easier to watch the details.
If you want to see more of those ships and how they work http://www.seajacks.com/about-seajacks/
George