Tower visibility refers to what type of visibility measurement?

Tower visibility specifically refers to the visibility measurement conducted from the control tower perspective while considering different atmospheric conditions that may not reflect ground-level visibility accurately. This means that tower visibility is taken into account when the visibility is measured from the elevated structure of a control tower, providing a view of the surrounding area that can be different from ground level measurements.

This is crucial for air traffic control and operations, as it ensures that pilots and air traffic controllers are aware of visibility conditions that might affect flight operations, even if those conditions differ from what is experienced at the airport's surface level. Thus, using the control tower's vantage point allows for a more comprehensive assessment of visibility, especially in scenarios where fog, rain, or other obstructions may impact visibility differently depending on altitude.