To tell
a) whether the wind is blowing or not
-AND-
b) which way the wind is blowing
~
A wind sock is used to show the direction of the wind.
The appearance of the wind sock gives a broad approximation to the wind speed, and a pretty good indication of the wind direction.
A wind sock, or wind cone.
Wind socks measure the direction of the wind when the wind blows into the open end and the sock points the way the wind is blowing. Wind socks can also measure the strength of the wind. If a wind sock is flapping about gently the wind is only light. If a wind sock sticks out in a straight line the wind is much stronger.
This is a wind sock to measure the wind direction.
A wind vane or a wind sock.
velocity direction indicator like a wind sock
Yes it does.
Use a wind sock or a wind vane.
Wind direction, and someone experienced can take a guess at wind speed.
There are at least two characteristics of wind that you might want to measure.-- Its speed can be measured with a wind-sock or an anemometer.-- Its direction can be measured with a wind-sock or a weathervane.
An air sock is another name for a windsock, a conical open-ended tube designed to indicate wind direction and relative wind speed.