France is testing these days the largest cruise ship in the world, water was released Thursday in the port of Saint-Nazaire . Harmony of the Seas , the largest cruise ship in the world , began its first tests on water in western France . The ship , which cost 1 billion euros , was built for Royal Caribbean International ( RCI ) , a US company specialized in organizing cruise vacations type . Harmony of the Sears weighs 120,000 tons and will be delivered to the US company two months. Her height is 70 meters . The ship has 16 decks and a total length of 362 meters . After finishing last achievement , the vessel will be able to get on board more than 6,000 tourists, whose needs will be met by a crew comprised of approximately 2,000 members .
