The Mariner of the Seas cruise ship is one of Royal Caribbean's second generation Voyager class ships. She has a twin sister, the Navigator of the Seas, and went through a very extensive renovation project in 2014. Her godmother is the American Paralympic athlete, Jean Driscoll.

The newly added features and activities are really impressive and include a Sky Pad virtual reality trampoline, a Playmakers Sports Bar and Arcade, and two FlowRider surf simulators. They also added forty more cabins as well as new dining venues, which gave this 15-year-old ship that all-important popular new ship feel.