Transatlantic liners are large passenger ships designed for regular service across the Atlantic Ocean. They were primarily used from the 19th to the mid-20th century to transport people and goods between Europe and North America. These ships offered various amenities, including dining rooms, lounges, and cabins, making long ocean voyages more comfortable. The heyday of transatlantic liners saw famous vessels like the RMS Titanic and the Queen Mary become symbols of luxury travel. With the advent of air travel, the popularity of these liners declined, but they remain an important part of maritime history and the evolution of ocean travel.