MS Mariner of the Seas is one of five Voyager-class cruise ships from Royal Caribbean International; it is one of the largest in its fleet and among the largest passenger ships in the world. It was constructed at Aker Finnyards in Turku Finland and had her maiden voyage in 2003. Currently the ship sails alternating 13 and 14 night round-trip cruises from Civitavecchia (Rome) Italy throughout the Mediterranean to ports in Italy Greece Turkey and Israel.
Builders of the MS Mariner of the Seas are Finland and STX Finland Cruise Oy.