The Symphony of the Seas is the world's largest passenger cruise ship. Measuring 362m (1,188ft) long, the ship has a capacity of nearly 9,000 passengers and crew, features 23 swimming pools and 18 decks.When we compare the ship's capacity to the Titanic, Symphony of the Seas can hold 5,542 more people than the Titanic. Surprisingly, the only area that Titanic has Symphony of the Seas beat is speed, but not by much.This gigantic ship is five times bigger than the Titanic. However, there’s no need to be concerned. Royal Caribbean currently owns seven of the ten largest cruise ships, so you know that you're in safe hands