PPRuNe Forums - View Single Post - ATC opinion please
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Old 5th Feb 2013, 12:53
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hangten
 
Join Date: Nov 2003
Location: UK
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I'm not an area controller but I am 99.9% sure the preference is to set 7700. I believe on all modern displays/radar processors this highlights your aircraft and maintains the callsign.

Prepare for higher authority...
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