Codock was a term used to describe Cockatoo Dockyard while I worked there as an apprentice from January 1981 to 1986. I was 16 when I began the journey and I was thrown into an industrial institution where the young boys were taught the mechanical craft initially by a collection of pre retirement tradesmen in a school like environment, then the last three years in the various workshops, ships and submarines that made up the bulk of work engaged at Codock.
Cockatoo Island is the largest island in Sydney Harbour and has an incredible history for both First Nations people and Colonists. The island was an active shipyard from 1857 until 1991 and the Wiki page is a good place to start for the history of Cockatoo Island. https://en.wikipedia.org/wiki/Cockatoo_Island_Dockyard
The images in this film show buildings and machinery still in tact at Cockatoo Island. Some of the machine shop machines I have actually used and they remain more or less in the exact spot they were in the machine shop in the early 1980’s.
The link below features an earlier piece filmed at Cockatoo.
Cockatoo Island: Heavy Shop 1