The largest vessel ever made was the Seawise Giant which was 1,504 feet in length and had a gross tonnage of 260,941. As it's no longer in use, the longest ship currently in use in the world is the Ever Ace container ship at 1,312 feet.
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Royal Caribbean International's Icon of the Seas is set to launch as the world's largest cruise ship in early 2024, measuring 365 meters long and weighing approximately 250,800 tons — or five times the size of the Titanic.
The Icon of the Seas, set to sail in the Caribbean in January, is five times the size of the Titanic. But it's unlikely to ever meet the same fate as the iconic ship, thanks to radar and iceberg monitoring. Royal Caribbean also says their cruise ships have enough lifeboats and rafts for everyone on board.
The 20-deck high ship comes in at 250,800 tons and will be more than six percent bigger than Wonder of the Seas and able to hold up to 7,600 passengers. Icon of the Seas will also be 10 feet longer than Wonder of the Seas.