When you check in at port you are given a boarding number. The sooner you get to port, the lower your boarding number is. All suites have boarding number 1, so if you are in category 4-12, the lowest boarding number you will get is 2. The numbers are called in order, and all passengers in the boarding group enter the ship. Ex: You have boarding number 5, you have to wait for the people in suite categories 1-3, and boarding groups 2-4 to enter the ship before you are able to board. The process does go fairly quickly, so even if you get a high boarding number, you will get on the ship in no time!