The ships will be the first in the cruise industry to be powered at sea by Liquefied Natural Gas (LNG).

The company said two of the ships will be manufactured for AIDA Cruises at Meyer Werft’s shipyard in Papenburg, Germany. Additional information about the ships, including which new ships will be added to each brand, will be made available at a later date.

Based on Carnival Corporation’s new ship design, each of the four next-generation ships will have a total capacity of 6,600 guests, feature more than 5,000 lower berths, exceed 180,000 gross tons and incorporate an extensive number of guest-friendly features. A major part of the innovative design involves making much more efficient use of the ship’s spaces, creating an enhanced onboard experience for guests.

LNG will be used to generate 100% power at sea. Using LNG to power the ships in port and at sea will eliminate emissions of soot particles and sulfur oxides.

In addition to the two ships being built in Germany, Meyer Werft—which had the capacity to accommodate these four ship-building orders in its production schedule—will also build the two additional ships at its shipyard in Turku, Finland. Each new ship will be specifically designed and developed for the brand and the guests it will serve, underscoring the company’s goal to consistently exceed guest expectations and provide first-time and repeat guests with the vacation experience of a lifetime on each and every cruise.