Quick Facts
- Type
- Weather Parameter
- Definition
- The greatest horizontal distance at which prominent objects can be seen and i...
- Used By
- Pilots, Dispatchers, ATC
Definition#
Visibility in aviation is the prevailing horizontal distance at which prominent unlighted objects can be seen by day, or prominent lighted objects by night. It is reported in statute miles (U.S.) or meters (ICAO).
Why It Matters Operationally#
Visibility is a determining factor for VFR/IFR flight category, approach authorization, and departure minimums. When visibility drops below specific thresholds, RVR becomes the controlling measurement.
Related Guides#
- How to Read a METAR
- How to Read a TAF
- Runway Visual Range (RVR)
- Aviation Weather Explained — The Complete Operational Guide