Caribbean – Lionel Messi has named the world’s biggest cruise ship, Royal Caribbean’s Icon of the Seas, while he and his Inter Miami teammates flaunted the team’s new away uniform sponsor. At 1,198 feet, it is the longest liner in the world. However, the $2 billion price tag came with the building of 20 decks and combined weight of 250,800 gross tonnes and a maximum capacity of 7,600 passengers.