AIM - AGA 5. 9 - Wind Direction Indicators

At aerodromes that do not have prepared runways, the wind direction indicator is
usually mounted on or near some conspicuous building or in the vicinity of the general
aircraft parking area.

Runways greater than 4 000 feet in length will have a wind direction indicator for each
end of the runway. It will be located 500 feet in from the runway end and 200 feet
outward, usually on the left side.

Runways 4 000 feet in length and shorter will have a wind direction indicator centrally
located so as to be visible from approaches and the aircraft parking area. Where only
one runway exists, it will be located at the mid-point of the runway 200 feet from the
edge.

For night operations the wind direction indicator will be lighted.

NOTE:     At aerodromes certified as airports, a dry Transport Canada standard Wind
                Direction Indicator will react to wind speed as follows:

WIND SPEED                          WIND INDICATOR ANGLE

15 KT or above                         Horizontal
10 KT                                       5° below horizontal
6 KT                                         30° below horizontal

At aerodromes not certified as airports, non-standard wind indicator
systems may be in use which could react differently to wind speed.