From the press release, for a ship to be based out of Port Canaveral:
Get ready to ride! In another cruise industry first, Carnival Cruise Line’s Mardi Gras™ will feature the first-ever roller coaster at sea when it debuts in 2020, providing an unforgettable and unique open-air thrill ride on the line’s newest and most innovative ship.
Built by Munich-based Maurer Rides, BOLT™: Ultimate Sea Coaster™ is a heart-pounding rush of adrenaline offering nearly 800 feet of exhilarating twists, turns and drops with riders reaching speeds of nearly 40 miles per hour.
Taking cruise industry innovation to new heights, BOLT is an all-electric roller coaster that allows two riders in a motorcycle-like vehicle to race along a track 187 feet above sea level, enabling guests to experience the sea in an exciting new way with breathtaking 360-degree views.
Read more from Carnival.