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non directional beacon
commun., transp., avia.	radiofarol não direcional
English thesaurus
Non-Directional Beacon
abbr., scottish	NDB
non-directional beacon
avia., Canada	An LF/MF or UHF radio beacon transmitting non-directional signals whereby the pilot of an aircraft equipped with direction-finding equipment can determine his or her bearing to or from the radio beacon and "home" on or track to or from the station. When the radio beacon is installed in conjunction with the instrument landing system ILS marker, it is normally called a marker beacon.

non directional beacon: 5 phrases in 2 subjects

Communications	3
Natural sciences	2