A cargo liner has been defined as: A vessel which operated a regular scheduled service on a fixed route between designated ports and carries many consignments of different commodities.
[3] They differed from ocean liners which focussed on the passenger trade, and from tramp steamers which did not operate on regular schedules.
[4] The steam-powered cargo liner developed in the mid-19th century with the advancement of technology allowing bigger steamships to be built.
[6] The use and increased reliability of the compound steam engine gave greater fuel efficiency and opened these routes up to steamships.
The recreational facilities are those used by the crew and may be limited to a lounge, a gym with exercise equipment and a small swimming pool.