Sea of the dammed

Where is the ferry of the dammed?
Where is the ferryman sailing?
How many other dammed ships are there?
I had an idea that there should be a dammed sea somewhere in the sea of thieves where there are other dammed ships that faze into existence beside your ship and attack you (like a skeleton ship) but the crew on the ship are not skeletons but unkillable ghosts of pirates (like the people at the legends hideout).
There would also be a constant fog and there would be islands that fit the same theme as the rest of the sea.
But I need more ideas about the islands and ghost ship because the islands are normal to any other island at the moment and the ships are not too special yet.