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DF guidance
运输	dirección DF; referencia DF
英语 词库
DF guidance
航空, 加拿大	Headings provided to aircraft by facilities equipped with direction-finding equipment. These headings, if followed, will lead the aircraft to a predetermined point, such as the radio direction-finding station or an airport. DF guidance is given to aircraft in distress or to other aircraft that request the service.