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navigational aid
commun., transp.	ajuda à navegação
transp.	ajudas à navegação
English thesaurus
navigational aid
avia., Canada	Any visual or electronic device, airborne or on the surface of the earth, that provides point-to-point guidance information or position data to aircraft in flight

navigational aid: 6 phrases in 3 subjects

Communications	3
Electronics	1
Transport	2