What is the meaning of penetration (air traffic control)?

penetration > air traffic control
Subtopics: intelligence 
(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.
Department of Defense Dictionary of Military and Associated Terms. 31 January 2011.
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APAMilitary Dictionary (DoD). (2011). penetration (air traffic control). Retrieved September 26, 2026, from http://smartdefine.org/penetration_(air_traffic_control)/definitions/1963287
ChicagoMilitary Dictionary (DoD). 2011. "penetration (air traffic control)" http://smartdefine.org/penetration_(air_traffic_control)/definitions/1963287 (accessed September 26, 2026).
HarvardMilitary Dictionary (DoD) 2011, penetration (air traffic control), Smart Define, viewed 26 September, 2026, <http://smartdefine.org/penetration_(air_traffic_control)/definitions/1963287>.
MLAMilitary Dictionary (DoD). "penetration (air traffic control)" 4 April 2011. Web. 26 September 2026. <http://smartdefine.org/penetration_(air_traffic_control)/definitions/1963287>