2014-09-03T09:53:17.694Z Aeronautical visibility The greater of:(a) The greatest distance at which a black object of suitable dimensions, situated near the ground, can be seen and recognized when observed against a bright background;(b) The greatest distance at which lights in the vicinity of 1000 candelas can be seen and identified against an unlit background. Aeronautical visibility aeronauticalVisibility L Aeronautical quantity kinds The greater of:(a) The greatest distance at which a black object of suitable dimensions, situated near the ground, can be seen and recognized when observed against a bright background;(b) The greatest distance at which lights in the vicinity of 1000 candelas can be seen and identified against an unlit background. marqh (admin) aeronauticalVisibility 1