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| ajuda à navegação | |||
| ajudas à navegação | |||
| English thesaurus | |||
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| 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 | |||
| navigation aid: 8 phrases in 3 subjects |
| Communications | 3 |
| Life sciences | 1 |
| Transport | 4 |