Nautilus hitting St George with an anchor

He had one arm up over his head, moving it in a slow, heavy circle. Moonlight glinted on the spinning length of chain. The big steel shape came at him again. Nautilus leaned into his swing, St. George tried to duck, and the yacht’s anchor slammed into his shoulder.
The impact hurled him off the ship. He caught himself before he hit the water and pushed his body back up through the air.

Excerpt From Ex-Isle, pg 536
Peter Clines
https://books.apple.com/us/book/ex-isle/id989619017