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ayuda a la navegación
avia.	navigation aid (v.gr., TACAN, radar, etc.)
econ.	navigation aid
transp.	navigational aid; navigational mark; navaid; aid to navigation
transp., polit.	navigational assistance
ayudas a la navegación
meteorol.	navigational aides probably should be navigational aids
transp.	aid to navigation; navigation aid; navigational aid; navigational assistance

ayuda a la navegación: 24 phrases in 3 subjects

Communications	5
Technology	5
Transport	14