Hydrogen fuel cells produce electricity through a chemical reaction between hydrogen and oxygen, emitting only water vapor as a byproduct.

AIDAnova, launched in 2018, is the first cruise ship to be powered by LNG, a cleaner alternative to traditional marine fuels.

Royal Caribbean's "smart ships" feature innovative technologies like facial recognition, mobile check-in, and interactive wayfinding systems.

Wonder of the Seas, scheduled to launch in 2022, will be the largest cruise ship in the world, accommodating over 5,700 passengers.

Hurtigruten, a Norwegian cruise line, is known for its expedition cruises to destinations like Antarctica, the Arctic, and the Norwegian fjords.

Celebrity Edge, launched in 2018, features a unique underwater observation lounge called the "Magic Carpet," which offers panoramic views of the marine environment.

Royal Caribbean's "private islands" include CocoCay in the Bahamas and Labadee in Haiti, offering exclusive amenities and activities for cruise passengers.

Celebrity Solstice, launched in 2008, was the first cruise ship to utilize a hybrid diesel-electric propulsion system, reducing fuel consumption and emissions.

Norwegian Cruise Line's "virtual balconies" are large LED screens that provide a real-time view of the outside scenery for interior cabins.

Harmony of the Seas, launched in 2016, features a roller coaster called the "Perfect Storm," making it the first cruise ship with an onboard amusement park ride.

Norwegian Cruise Line's "dynamic dining" concept allows passengers to choose from a variety of dining venues and times, providing more flexibility and personalization.

Celebrity Edge, launched in 2018, features a robotic bartender named "Bionic Bar," which prepares and serves cocktails using artificial intelligence.

Royal Caribbean's "immersive entertainment" includes shows like "Cats" and "Mamma Mia!" as well as interactive experiences like the "Escape Room" and the "Virtual Reality Arcade.

Norwegian Breakaway, launched in 2013, features a "floating go-kart track" called the "Speedway," allowing passengers to race go-karts while enjoying panoramic views of the ocean.

MSC Cruises' "wellness cruises" offer a range of fitness classes, spa treatments, and healthy dining options, catering to passengers seeking a holistic wellness experience.