Technology has already relieved the flight deck of a number of jobs. Many early large aircraft had a crew of five: two pilots, a flight engineer, a navigator and a radio operator. First the radio operator went, then the navigator, and by the time the jet era was well under way in the 1970s flight engineers began to disappear too. Next it could be the co-pilot, replaced by the autonomous flight systems now being developed.

via Pilotless aircraft: This is your ground pilot speaking | The Economist.