I've seen these many times before and I have no idea what they are.

I live in Manhattan and I was walking along the Hudson and I saw these
wooden poles randomly sticking up out of the water. They were various
heights and they didn't seem to be doing anything. When I rode the
Staten Island Ferry over to Staten Island, when the ferry pulled up to
dock, I noticed a very large amount of these poles right by the docking
area, as well.

What are these poles for? Thanks.

Ryan Cabanas