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not to knock cruises, because I go at least once a year, but I also travel to different locations for diving and fishing. If you are really wanting a diving vacation I would not cruise, I would go to Cayman Island or other locations for 4 or more days and get to spend spome quality time diving. if you are just looking to spend a couple of hours diving over a 5 to 7 day vacation then do it as part of a cruise.