People look at the Harmony of the Seas cruise ship leaving the STX shipyard of Saint-Nazaire, western France, for a three-day test offshore, on March 10, 2016. With a capacity of 6.296 passengers and 2.384 crew members, the Harmony of the Seas, built by STX France for the Royal Caribbean International, is the world's largest ship cruise. (Photo by Loic Venance/AFP Photo)





The Harmony of the Seas ( Oasis 3 ) class ship leaves the STX Les Chantiers de l'Atlantique shipyard site in Saint-Nazaire, France, March 10, 2016. The city’s STX France shipyards began building the €1bn ($1.1bn) mammoth for US shipbuilder Royal Caribbean International (RCI) in September 2013. Thousands of people gathered at the dock to watch as the 120,000-tonne ship was helped out to sea by six tugs. Some 500 people, mostly crew as well as officials from the owners and engineers and suppliers, were on board for the first trial, set to continue until Sunday. The ship, with a height of 70m (210 feet), has been an imposing presence in Saint-Nazaire, visible from miles away. For months, tourists have been allowed on board to gape at the innards of the ship that has 16 decks and stretches 362m (1,187 feet), 50m longer than the height of the Eiffel Tower. (Photo by Stephane Mahe/Reuters)





The Harmony of the Seas ( Oasis 3 ) class ship leaves the STX Les Chantiers de l'Atlantique shipyard site in Saint-Nazaire, France, March 10, 2016. (Photo by Stephane Mahe/Reuters)





The Harmony of the Seas ( Oasis 3 ) class ship leaves the STX Les Chantiers de l'Atlantique shipyard site in Saint-Nazaire, France, March 10, 2016. (Photo by Stephane Mahe/Reuters)





The Harmony of the Seas ( Oasis 3 ) class ship leaves the STX Les Chantiers de l'Atlantique shipyard site in Saint-Nazaire, France, March 10, 2016. (Photo by Stephane Mahe/Reuters)





The Harmony of the Seas ( Oasis 3 ) class ship leaves the STX Les Chantiers de l'Atlantique shipyard site in Saint-Nazaire, France, March 10, 2016. (Photo by Stephane Mahe/Reuters)





The Harmony of the Seas ( Oasis 3 ) class ship leaves the STX Les Chantiers de l'Atlantique shipyard site in Saint-Nazaire, France, March 10, 2016. (Photo by Stephane Mahe/Reuters)





The Harmony of the Seas ( Oasis 3 ) class ship leaves the STX Les Chantiers de l'Atlantique shipyard site in Saint-Nazaire, France, March 10, 2016. (Photo by Stephane Mahe/Reuters)





The Harmony of the Seas ( Oasis 3 ) class ship leaves the STX Les Chantiers de l'Atlantique shipyard site in Saint-Nazaire, France, March 10, 2016. (Photo by Stephane Mahe/Reuters)





The Harmony of the Seas ( Oasis 3 ) class ship leaves the STX Les Chantiers de l'Atlantique shipyard site in Saint-Nazaire, France, March 10, 2016. (Photo by Stephane Mahe/Reuters)





The Harmony of the Seas ( Oasis 3 ) class ship leaves the STX Les Chantiers de l'Atlantique shipyard site in Saint-Nazaire, France, March 10, 2016. (Photo by Stephane Mahe/Reuters)





The Harmony of the Seas ( Oasis 3 ) class ship leaves the STX Les Chantiers de l'Atlantique shipyard site in Saint-Nazaire, France, March 10, 2016. (Photo by Stephane Mahe/Reuters)





The Harmony of the Seas ( Oasis 3 ) class ship leaves the STX Les Chantiers de l'Atlantique shipyard site in Saint-Nazaire, France, March 10, 2016. (Photo by Stephane Mahe/Reuters)