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Old 24th Sep 2019, 08:59
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sonicbum
 
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Originally Posted by ScepticalOptomist
On the routes I fly the only ATC unit asking for that is NZZO.

Does anyone know why?
This is what I got from our FANS manual :

Transmission times for messages may vary for a number of reasons including the type of transmission media, network loading, or the criteria for transitioning from one media to another (e.g. VHF/Satcom). Operational response times may vary depending on workload and complexity of the instruction or clearance.

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