In a run-down office at Bali’s Ngurah Rai International Airport, the head of air traffic services Tri Basuki says staff do double shifts because he has less than 50 percent of the people needed to operate radar, surveillance and navigation systems.

For air traffic control it is even worse. There are only 43 people, or about a third of a government requirement for 115, to guide the airport’s average of 330 landing aircraft a day.

Basuki said some of the controllers at Bali are suffering from cumulative fatigue. “When the controller is fatigued, it’s high risk, very high risk,” he said.

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