R&A has various meanings in the Governmental & Military category. Discover the full forms, definitions, and usage contexts of R&A in Governmental & Military.
The height of an aircraft above terrain immediately below the it taken from a Radio Altimeter.
Governmental & MilitaryAn onboard radar for determining the altitude of an aircraft above an underlying surface.
Governmental & MilitaryA device for measuring the height of the aircraft above the Earth using reflected radio waves
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