A stevedore (/ˈstiːvɪˌdɔːr/), also called a longshoreman, a docker or a dockworker, is a waterfront manual laborer who is involved in loading and unloading ships, trucks, trains or airplanes. After the shipping container revolution of the 1960s, the number of dockworkers required declined by over 90%, and the term "stevedore" has increasingly come to mean a stevedoring firm that contracts with a port, shipowner, or charterer to load and unload a vessel.