What is a key indicator of wind shear during flight?

Wind shear is characterized by a rapid change in wind speed and direction both vertically and horizontally. During flight, this phenomenon can significantly affect aircraft performance and handling. When pilots encounter wind shear, they may experience sudden changes in airspeed, which can lead to unexpected altitude changes or difficulties in maintaining control.

For instance, if the wind speed increases sharply while maintaining a constant altitude, it may indicate that the aircraft is entering a shear layer, potentially leading to turbulence or a loss of lift. Pilots are trained to recognize these signs early to adjust their flight strategies accordingly, ensuring safety.

The other options do not effectively represent a key indicator of wind shear. Increasing altitude without a change in speed could indicate a steady ascent rather than a shear event. Consistent altitude with fluctuating course may suggest lateral movement but does not directly relate to wind shear's sudden changes. A steady climb with no turbulence suggests stable flying conditions and is not indicative of wind shear.