CLS4 Carpentaria is one of four identical lightships designed in 1915 by the Scottish firm D & C Stevenson of Edinburgh and built in 1916-17 at the Cockatoo Island Dockyard in Sydney, Australia; they were designated CLS1 to CLS4.
Carpentarias lantern was powered by acetylene gas, of which she carried a 6-month supply in 4 tanks; the gas flow was controlled by a valve which would regulate the flashes of the light according to the code assigned to the station.