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Old October 13th 04, 11:18 PM posted to uk.sci.weather
Hwson58 Hwson58 is offline
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First recorded activity by Weather-Banter: Oct 2004
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Default Prevailing visibility

Phil,
The change will only affect METARs from CIVIL airfields. The military are still
discussing the implications and may not make the change until sometime later.
Currently any double reporting of visibility again only occurs at Civil
airfields. military airfileds always report the worst visibility.
i believe civil METARs report two visibilities when they affect the runways