Which of the following is NOT a method to determine wind direction from the air?

Determining wind direction from the air is important for pilots to make informed decisions regarding navigation and approach. Various methods are employed to assess the wind direction, such as using GPS, VORs, and visual cues like smoke.

GPS can provide information about groundspeed and ground track, allowing pilots to infer wind direction based on the difference between intended airspeed and groundspeed. VOR stations can also indirectly help determine wind direction by allowing pilots to navigate and assess drift over a predefined route. Visual cues like smoke or the movement of other objects can give immediate, observable indications of wind direction and strength.

In contrast, altimeter settings are primarily used to determine altitude above sea level and are not designed to provide information about wind direction. Altimeter settings are essential for maintaining proper altitude but do not relate to wind conditions or direction at altitude. Thus, this method does not contribute to determining wind direction from the air.