Precision approach path indicator: Difference between revisions

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== Sources ==
 
* [http://www.faa.gov/ATPubs/AIM/Chap2/aim0201.html#2-1-2 FAA Aeronautical Information Manual: Visual Glideslope Indicators]
* [http://av-info.faa.gov/terps/Directives_files/8260.49.pdf FAA TERPS directive]