I stopped at town hall yesterday and had VERY limited time to do it and finally got an answer that "port jeff" has nothing to do with the shore line, I needed to go to Brook Haven town hall! So I bailed out and I'l try again. Sorry guys. I should have just called.
FYI, the Brookhaven harbormaster has an office in the 2 story brown tower by the dock, next to the ferry waiting room.