Which cruise ship introduced Bolt, the first roller coaster at sea?

Carnival Cruise Line’s Mardi Gras introduced Bolt, the first roller coaster at sea.

Mardi Gras entered service in 2021 as Carnival’s first LNG-powered vessel and the first ship in the line’s Excel class. Bolt is an electric open-air ride positioned high above the ocean, with motorcycle-style vehicles carrying riders along a track that includes sharp turns and drops.

The ship’s name honors Carnival’s first vessel, also called Mardi Gras, which entered service in 1972. Bolt is distinct from water slides and simulator attractions that had appeared on earlier cruise ships; it is a true track-based roller coaster designed specifically for a moving vessel.