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Thread: You are flying at an altitude of 35,000 ft , what is approximate range of your commun
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Old 28th Dec 2010, 09:40
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Alex Whittingham
 
Join Date: May 1999
Location: Bristol, England
Age: 65
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The UK CAA used to use 1.25, the rest of the world used 1.23. The current JAA syllabus uses 1.23. The difference between the two factors is less than 2% and the formula is only an approximation anyway, including an element for refraction and ducting in VHF/UHF.

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