Queen Mary 2 in the context of "Stephen Payne (naval architect)"

An ocean liner is a type of passenger ship primarily used for transportation across seas or oceans. Ocean liners may also carry cargo or mail, and may sometimes be used for other purposes (such as for pleasure cruises or as hospital ships). The Queen Mary 2 is the only active ocean liner in 2025, serving with Cunard Line.

The category does not include ferries or other vessels engaged in short-sea trading, nor dedicated cruise ships where the voyage itself, and not transportation, is the primary purpose of the trip. Nor does it include tramp steamers, even those equipped to handle limited numbers of passengers. Some shipping companies refer to themselves as "lines" and their passenger ships, which often operate over set routes according to established schedules, as "liners".

Saint-Nazaire (French: [sɛ̃ nazɛːʁ] ; Breton: Sant-Nazer/Señ Neñseir; Gallo: Saint-Nazère/Saint-Nazaer) is a port town and commune in the Loire-Atlantique department in western France, in traditional Brittany.

The town has a major harbour on the right bank of the Loire estuary, near the Atlantic Ocean. The town is at the south of the second-largest swamp in France, called "la Brière". Given its location, Saint-Nazaire has a long tradition of fishing and shipbuilding. The Chantiers de l'Atlantique, one of the largest shipyards in the world, constructed notable ocean liners such as SS Normandie, SS France, RMS Queen Mary 2 and the cruise ship MS Symphony of the Seas, the largest passenger ship in the world until 2022.