How is visibility expressed in aviation measures?

In aviation, visibility is typically expressed in statute miles, often as separate digits, particularly in contexts such as weather reports and airport operations. This method of reporting provides pilots with clear and concise information about how far they can see, which is critical for safe operations and navigation. The use of statute miles also aligns with the way other aviation measurements, such as distances in the United States, are commonly presented.

While kilometers, meters, and nautical miles are used in various contexts within aviation and other fields, statute miles are the standard for visibility because they are widely understood in the regions where most flights occur, particularly in North America. The expression of visibility in separate digits helps ensure clarity, enabling pilots to quickly assess the situation and make informed decisions concerning their flights. This format also aids in providing a uniform standard across communication channels in aviation.