"Localizers aligned within three degrees of the RCL are identified as localizers. If the alignment exceeds 3 degrees, they will be identified as LDA facilities." Section 8, Item 8-1-2.b, United States Standard for Terminal Instrument Procedures(PDF). U.S Department of Transportation Federal Aviation Administration. [2024-08-10]. (原始内容存档(PDF)于2017-05-13).
Department of Transportation and Department of Defense. 2001 Federal Radionavigation Systems(PDF). March 25, 2002 [November 27, 2005]. (原始内容存档(PDF)于2017-07-07).
Department of Transportation and Department of Defense. 2001 Federal Radionavigation Systems(PDF). March 25, 2002 [November 27, 2005]. (原始内容存档(PDF)于2017-07-07).
"Localizers aligned within three degrees of the RCL are identified as localizers. If the alignment exceeds 3 degrees, they will be identified as LDA facilities." Section 8, Item 8-1-2.b, United States Standard for Terminal Instrument Procedures(PDF). U.S Department of Transportation Federal Aviation Administration. [2024-08-10]. (原始内容存档(PDF)于2017-05-13).