Research indicates that approximately 25% of air traffic controller trainees do not successfully complete their field training during their initial facility assignment. This relatively high failure rate reflects the rigorous nature of ATC training, which tests candidates' ability to handle complex and high-pressure situations essential for ensuring aviation safety. Trainees who do not meet the required standards at their first facility are often given the opportunity to transfer to less complex or smaller facilities, where they can further develop their skills and potentially reattempt the training. This process underscores the challenging nature of ATC training and the importance placed on maintaining high safety standards within the industry.