There are kind of two halves to that idea - towing a barge rather than having a single big ship, and using some space for cruise passengers rather than cargo.<p>For the first half, it sounds like a clever way of getting around the Panama Canal lock size limits, so I can only assume there are good reasons not to - maybe towing a barge across the ocean is too dangerous given the kind of storms you get there?<p>For the second thing there&#x27;s plenty of competition from large purpose-built cruise ships (e.g. Oasis of the Seas is bigger-than-panamax). So I doubt space on a cargo ship would be competitive with space on a dedicated cruise ship. Fundamentally the cruise industry is subject to the same issues of overbuilding and consolidation.