Levels of Turbulence
Light – Small, correctable deviations from position and altitude. Aircraft control is maintained.
Moderate – Significant deviations from position and altitude. Momentary losses of control of aircraft.
Severe – Uncontrollable deviations from position and altitude. Loss of control of aircraft; possible deformation and destruction of aircraft.
New technology for detecting turbulence
In aviation, the Richardson number is used as a rough measure of expected air turbulence. A lower value indicates a higher degree of turbulence.
Values in the range 10 to 0.1 are typical, with values below unity indicating significant turbulence.
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