Where I live in Florida only has cruise ship casinos nearby to play blackjack at. They voyage twice a day for five hours at a time. I'm just wondering what happens if you get backed off on a ship? They can't kick you out and you can't leave until you get back to the port. And since they have to check IDs for everyone that boards, is it a bad idea to count at their tables since they already know everyone's name on the ship?