Originally Posted by
DanJ
I liken it to the party/gambling boats they do (or at least did) run out of places like Port Canaveral and Ft Lauderdale. There aren't any customs/immigration at the end of those because they didn't go anywhere. I've never done either, so I don't have first hand knowledge, but I've been a fairly active member on cruisecritic for 10 years and have never read anything about c/i at the end of a cruise to nowhere.
There are no immigration or customs checks - going into international waters without visiting a foreign port will not trigger an immigration check.
Dinner/gambling cruises leave Ft Laud every day and evening, sail to international waters for gambling then return - nothing more is needed than a photo ID (which in itself is a stupid requirement), and no checks or restrictions at return.