What is the difference between a ship belonging to a line and a large passenger ship referred to as a "liner"?

 A ship belonging to a line typically refers to a vessel that is part of a specific shipping company or line, each with its own fleet and operations. These ships are often employed for the transportation of goods, and they can vary in size and purpose based on the specific needs of the shipping company.

On the other hand, a "liner" specifically denotes a large passenger ship designed for regular and scheduled voyages, primarily catering to the transportation of passengers rather than cargo. Liners are known for their comfort, amenities, and adherence to set routes and timetables, offering a more luxurious and predictable travel experience.

While a ship belonging to a line can encompass various types, including cargo vessels, tankers, and container ships, a "liner" is a specialized category focusing primarily on the passenger transport sector. The term "liner" often conveys a sense of grandeur and sophistication associated with passenger travel on the open seas, harkening back to a bygone era when ocean liners were a popular means of long-distance travel.