MV Glen Sannox was a Clyde car ferry launched in 1957. Built for the Arran service, she spent her first 14 years there. Thereafter, she had a versatile career on the west coast of Scotland, lasting over 32 years, including providing cruises between 1977 and 1982. In 1989, she was sold for service on the Red Sea. She ran aground south of Jeddah and lay in a sunken condition from 2000.

The Caledonian Steam Packet Company provided a scheduled shipping service, carrying freight and passengers, on the west coast of Scotland. Formed in 1889 to complement the services of the Caledonian Railway, the company expanded by taking over rival ferry companies. In 1973, they were merged with MacBraynes as Caledonian MacBrayne.