Difference between revisions of "Geographical Range"
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[[Category:2.1 Optics and Vision]] | [[Category:2.1 Optics and Vision]] | ||
[[Category:Alphabetical Index]] | [[Category:Alphabetical Index]] | ||
[[Category:IALA Dictionary | [[Category:IALA Dictionary 2018 Revision]] | ||
[[Category:Approved by Council through approval of source document]] | [[Category:Approved by Council through approval of source document]] | ||
Revision as of 15:41, 18 February 2018
The greatest distance at which an object or a light source can be seen under conditions of perfect visibility, as limited only by the curvature of the earth, by refraction of the atmosphere, and by the elevation of the observer and the object or light.
Source: ENG7, Guideline G1065 (2017)