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'''2-1- | '''urn:mrn:iala:dic:2-1-0275''' | ||
1. That property of the atmosphere which determines the ability of an observer to see and identify prominent objects by day, or lights or lighted objects by night. | 1. That property of the atmosphere which determines the ability of an observer to see and identify prominent objects by day, or lights or lighted objects by night. | ||
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[[Category:Alphabetical Index]] | [[Category:Alphabetical Index]] | ||
[[Category:IALA Dictionary 1970-89 Edition]] | [[Category:IALA Dictionary 1970-89 Edition]] | ||
[[Category:IALA Dictionary 2023 Revision]] | |||
Latest revision as of 10:13, 17 September 2026
1. That property of the atmosphere which determines the ability of an observer to see and identify prominent objects by day, or lights or lighted objects by night.
2. A measure of this property of the atmosphere expressed in units of distance.
3. Commonly used for "meteorological visibility".
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
