When taking a visibility observation, where should the observation be taken from?

When taking a visibility observation, it is essential to gather data from as many locations as practicable. This approach provides a comprehensive view of potential visibility variations across the area being observed. Different locations may experience varying visibility conditions due to factors like terrain, local weather phenomena, or obstructions. By sampling from multiple points, observers can ensure a more accurate representation of the overall visibility at the site, which is crucial for safety and operational decisions, especially in aviation and meteorology.

Choosing a single location or confining observations to specifically designated areas, like a runway or control tower, can lead to incomplete or skewed data, since visibility can change significantly over short distances. Thus, collecting observations from various locations enhances the reliability of the visibility assessment and supports better situational awareness.