Cruise ships are frequently classified by size, associated with a particular commercial cruise line, and not a more general industry-wide characterization. The example of the cruise line owning the biggest vessels of all is illustrative.
Royal Caribbean International (RCI) classifies its vessels into seven different classes. The four Oasis-class ships, namely Harmony, Allure, Symphony, and Oasis of the Seas, have a capacity of 6.680-6.780 passengers (and are the world’s largest cruise ships. Each of them has more than 16 decks, standing as small towns with distinct “neighborhoods” and numerous amenities to fill the expectations of wider social and age groups. When we compare these ships’ capacity to the Titanic, the Oasis-class Symphony of the Seas, which is the largest passenger ship in the world can hold 5,542 more guests than the Titanic.
The RCI order book until 2023 includes one more Oasis-class and one more Quantum-class vessel. The other three vessels to be delivered by 2025 indicate the shift of interest: these will be the first RCI owned LNG-powered vessels, leading to a new class, the Icon class.