Anemometer and wind vane. This anemometer uses cup-shaped vanes to catch the wind. These rotate and trigger a reading of wind speed. The vane (centre left) shows the direction of the wind. The compass directions show the wind direction to an observer. Regular data on wind speed and wind direction is required not only by meteorological stations throughout the world, for general forecasting and weather records, but specifically by airport and marine authorities, civil engineers and contractors on major projects, farmers, sport and other outdoor event promoters, holiday tour operators, resort managers and many others. This anemometer is manufactured by Munro.