society > occupation and work > worker > workers according to type of work > manual or industrial worker > worker in specific place > [noun] > at docks > casual (3)
A casual labourer employed at quays, docks, etc. local.
In plural. Casual dockyard labourers who are regularly preferred for hiring when work is available. Now historical.
A casual, non-Union, dock labourer. New Zealand slang.