There was little acceptance of the devices in Australia, however, a British company bought the manufacturing rights and began to produce cockpit voice and flight data recorders. Dr. Warren liked to share how his devices, which in fact are bright orange for better visibility, became known as the "Black Boxes". Warren says, “It was called a black box because in the records of my meeting in London when it was first demonstrated and they were so keen, one of the people in the discussion afterwards said, ‘This is a wonderful black box.’ And a black box back then was a gadget box. You didn't have to understand it but it did wonderful things.”
Coincidentally, the first government to make the flight and voice recorders mandatory was Australia. The step was taken after the investigation of a Fokker F27 crash in Queensland did not have enough information to reach a definite conclusion in the probable cause of the accident.