“I feel there are a number of speculations at this stage, and the investigation hasn’t actually begun,” Hassan Shahidi, chief government of the unbiased Flight Security Basis, advised AFP.
“There are completely different shifts … that are available and are put along with the appropriate workers to deal with the quantity of site visitors.
“Generally air site visitors controllers deal with one frequency. Generally they deal with two frequencies. Generally they deal with greater than two frequencies.
“That’s all depending on the scenario, on the site visitors degree, and the time of day. This was at evening, at 9pm, when the site visitors is subsiding.”