In setting this record, Royal Caribbean is actually surpassing itself. Symphony is only slightly bigger than the current largest ship in the world, Royal Caribbean's Harmony of the Seas. Both ships are in Royal Caribbean's Oasis Class of vessels, which are more than 30% larger than the next largest cruise ships. Symphony and Harmony are both around 1,188 feet long, but Symphony is 1,000 tons heavier and has 2,774 cabins and space for 6,680 passengers.
If you're one of those several thousand, you'll be treated to laser tag, a new seafood concept, and a live performance of the Broadway show Hairspray, plus a heck of a lot of pools and slides, and dozens of lounges, bars, and restaurants. Most wild of all, however, are the two-story family suites that feature a slide connecting the upper and lower floors. Is this practical at all? No, but if you're looking for a practical slide, you might misunderstand slides.