This is basically correct. There are two other contributing factors: - The controller who was talking to the two aircraft was a trainee (and being supervised b

This is basically correct. There are two other contributing factors: - The controller who was talking to the two aircraft was a trainee (and being supervised by a senior controller). - The sequence happened after sunset, but before EENT, and the controller cleared the aircraft after judging the distance visually. Most things aviation-related, and in particular visually judging distance, become much harder after the sun sets. Incident info: http://avherald.com/h?article=4cb85fbe http://avherald.com/h?article=4cb85fbe Departing flight: https://flightaware.com/live/flight/QFA459/history/20190805/0810Z/YSSY/YMML https://flightaware.com/live/flight/QFA459/history/20190805/... Sunset table: https://www.timeanddate.com/sun/australia/sydney?month=8&year=2019 https://www.timeanddate.com/sun/australia/sydney?month=8&yea...