TeachMeFinance.com - explain penetration (air traffic control)
penetration (air traffic control) 'penetration (air traffic control)' is an military term. It means '(DOD) That portion of a published high altitude instrument approach procedure that prescribes a descent path from the fix on which the procedure is based to a fix or altitude from which an approach to the airport is made'.
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Author: Mark McCracken is a corporate trainer and author living in Higashi Osaka, Japan. He is the author of thousands of online articles as well as the Business English textbook, "25 Business Skills in English".