Difference between revisions of "Geographical Range"
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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. | |||
[[Image:Ch2_Fig9.jpg|400px|border]] | |||
{{languages|Codes on Alerts and Indicators}} | |||
[[Category:2.1 Optics and Vision]] | |||
[[Category:Alphabetical Index]] | |||
[[Category:IALA Dictionary 2017 Revision]] | |||
[[Category:Approved by Council through approval of source document]] | |||
Source: ENG7, Guideline G1065 (2017) | |||
Revision as of 14:10, 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)