Royal Caribbean Cruises has ordered a fourth Oasis-class ship for delivery in 2018.
The announcement was made during the keel-laying of the third Oasis ship, Oasis III, in St Nazaire, France, on Friday.
"The Oasis Class was a revolution in maritime design when it was launched in 2009. Oasis of the Seas and Allure of the Seas continue to be in a class by themselves both in terms of guest satisfaction and financial returns. Today’s announcement is a reflection of their success," said Richard D. Fain, chairman and chief executive officer.
"We are thrilled to announce the order of a fourth Oasis-class ship during the keel-laying milestone of the third. This announcement is also a testament to the men and women of STX France who have worked so hard and so cooperatively on Oasis III."
The cruise line said the fourth ship would build on the energy efficiency of the third, which will be around 20% more energy efficient than Oasis of the Seas and Allure of the Seas.
