This chapter proposes methods for assessing the quality of entry into the glide path using autocorrelation functions and regarding the psycho-physiological state of the human operator. This is due to the possible increase in the psycho-physiological tension of a human operator in special flight situations. The analysis of the pilot's ability to control the trajectory of the aircraft is presented. A method for alerting the crew about the failure in the system for obtaining data on the angle of attack and airspeed to prevent non-coordinated turn is given. The majority of the calculations are based on the method of determining the correlation fields during the flight.