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Thread: RT high tone carrier wave on UAL?
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Old 4th Jul 2017, 15:09
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CaptainMongo
 
Join Date: Oct 2015
Location: 43N
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SOP - boom mikes required below 18,000'. "Most" crews won't go on speaker/hand mike until cruise. Flying over the pond, virtually all crews will be on speaker/handmike.
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