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automatic radio compass
shipb.	自动无线电罗经; 无线电自动罗经
space	自动无线电罗盘
tech.	自动无线电测向仪
English thesaurus
automatic radio compass
avia., Canada	An aircraft radio navigation system that senses and indicates the direction to a LF/MF non-directional beacon NDB ground transmitter. Direction is indicated to the pilot as a magnetic bearing or as a relative bearing to the longitudinal axis of the aircraft depending on the type of indicator installed in the aircraft. In certain applications, such as military, ADF operations may be based on airborne and ground transmitters in the VHF/UHF spectrum.

automatic radio compass: 3 phrases in 2 subjects

Air defense	1
Space	2