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ILS-past and present |
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| Authors: | Roepcke F |
| Institution: | Federal Aviation Admin., Oklahoma City, OK; |
| Abstract: | Insight is provided into the evolution of VHF/UHF instrument landing system (ILS) equipment and the role of the US Civil Aeronautics and Federal Aviation Administrations in its development. The discussion covers the ILS localizer, glide slope (image arrays and nonimage arrays), marker beacon, reliability, and avionics |
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