Royal Caribbean Cruises has contracted with STX France to build a third Oasis-class vessel for delivery in mid-2016. In October, the cruise line announced it planned another sister ship to the successful Oasis of the Seas and Allure of the Seas.

The contract, subject to financing and other conditions, includes the transfer of Pullmantur’s Atlantic Star. STX France has also provided the company with a one-year option for the mid-year 2018 delivery of a fourth Oasis-class vessel at similar pricing.

Oasis of the Seas and Allure of the Seas, with 16 decks and 2,700 staterooms, are the largest cruise ships in the world. The ships sail weekly to the Caribbean from their home port of Port Everglades in Fort Lauderdale.