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First of all, are you on a Carnival ship? Carnival has about 22 ships, but no cabin numbers D4-7209. If D4 stands for deck four, cabin number 7209 is not on deck four. If you have it backwards, and mean 4D, that is an inside cabin. However, Carnival has at least three classes of ships that could have 7209 as an inside cabin. So, what ship are you on?
