Wind indicators are primarily used to determine what aspect of weather conditions?

Wind indicators are essential tools in marksmanship as they help shooters understand the velocity of the wind. Wind can significantly affect the trajectory of a bullet, making it crucial for precision shooting. By measuring the wind's speed, shooters can make informed adjustments to their aim to ensure that they hit their target accurately despite any wind interference.

While other aspects of weather, such as humidity or temperature, can influence overall shooting conditions, they do not directly relate to the immediate effects of wind on bullet flight. The direction of precipitation is also important for setting up a shooting range, but it does not provide the same necessary information about wind's immediate impact on marksmanship as knowing its velocity does. Understanding wind velocity allows for better shooting strategies and enhances overall accuracy.