The Kelly method is a way of finding if your guarnatee cabin has been assigned. You do it by going to the Carnival Website and trying to order a Bon Voyage gift.
Begin the order process by entering your confirmation number and then start entering cabin numbers in the category you booked. You will get an error until you hit the cabin that has been assigned to you. If you do not find it in the category you booked then you go up to the next category and on and on. It can be a very time consuming process. Also, the cabin number you find may not be the final one you end up with.
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"There is a great difference between being well traveled and just having been to many places." ~Me