Ships that sail across the ocean and operate on scheduled time tables are?

Ships that sail across the ocean and operate on scheduled time tables are called "ocean liners". These ships are designed to transport passengers and cargo on regular, predetermined routes between different ports around the world. Unlike tramp steamers, which operate on a more flexible and irregular schedule, ocean liners typically have set departure and arrival times, allowing travelers to plan their journeys in advance. They are generally larger and more luxurious than other types of ships, and often offer a wide range of amenities and entertainment options to passengers during their voyage.