ICAO has a regulation that the Aviation Authority's audit team. Be training courses for at least 6 months.Or must have experience in the control of the aircraft for at least 2 years, but given time period is quite long, including personnel in the field is quite low.So when the business needs are greater, therefore, may require a lot of people. Individuals with inadequate standards, therefore, the need to hire someone to work but may not pass the ICAO standards defined.
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