A vane is a simple device used to indicate the direction of the wind. It typically consists of a flat, lightweight material that spins or tilts in response to the wind's movement. Commonly seen on rooftops, these indicators help people understand wind patterns, which can be important for activities like sailing or flying. In addition to wind direction, vanes can also be found in various instruments, such as anemometers, which measure wind speed. These devices often use multiple vanes to provide accurate readings, making them essential tools in meteorology and aviation. Understanding how vanes work can enhance our awareness of weather conditions.