Visibility
European Supplement
urn:aero:ses:eurocontrol:airm:1.0.0:ContextualModel:ATMBusinessTerms:WMO:Visibility
The greatest distance that prominent objects can be seen and identified by unaided, normal eyes. Unless otherwise stated, visibility is determined in the horizontal plane at the ground surface.
Source:
WMO METeorological Community Exchange (METCE)