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The 'Symphony Of The Seas' is one of the largest cruise ships in the world and is definitely a floating city. We had access to privileged areas of the mega-cruise ship, never visited by a passenger. This extraordinary ship is kept afloat by its mechanisms, crew and personnel. Which never ceases to amaze about 6 thousand passengers on board. We bring you the surprising facts about why the ultra-modern 'monster' has a 19th-century telephone and who needs tons of ice. #technology #cruise #engineering