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IEVref:713-04-09ID:
Language:enStatus: Standard
Term: instrument landing system
Synonym1: ILS (abbreviation)
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Definition: radionavigation system using the VHF and UHF frequency bands, which provides aircraft with both horizontal and vertical guidance just before and during landing and, at certain fixed points, indicates the distance to the reference point of landing


Publication date:1998-04
Source:ITU RR 98 MOD
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