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Thread: AIRAC Effective date versus FMS Database
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Old 2nd September 2021 | 23:30
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turbidus
 
Joined: Nov 2019
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From: USVI
Each country determines the exact time of the switchover to coincide with low air traffic volume.
In the U.S. it is 0900 Zulu or 1200 a.m. to 0400 a.m. local depending on time of year and zone.
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