The big white balls are floats for fuel barges said to brought in during the winter. The moorings belong to the guy who owns the house with the Allied 32 ketch sitting next to his boat house. and dock. I tie up to one of those balls whenever I am in Tashmoo. I have asked permission and was granted same. Since they don't have pendants the only way to tie securely is to dive and run lines through the huge shackle on the bottom of the big ball, or to the chain just beneath. However, and here's the rub (no pun intended ), those chains have been down there so long (many years) that there is marine growth heavy on the shackle and chain. So a line tied to either is subject to chafe, especially in a blow like Arthur. There are anecdotes about guys using a light line and having it chafe through.