According to the International Civil Aviation Organisation, audio recordings from cockpit voice recorders supplement flight data by providing related details on flight crew responses. The recordings also aid in assessments of how radio communications or other outside distractions may have been a factor in an accident.

All but one of those on board an Air India flight bound for London Gatwick Airport that crashed shortly after take-off in western India on Thursday have died, the airline has confirmed.

It reached an altitude of 625 feet in clear conditions when it stopped transmitting location data, according to Flightradar24, just 50 seconds into the flight.