Also known as: RA#, RA...
RA has various meanings in the Aerospace category. Discover the full forms, definitions, and usage contexts of RA in Aerospace.
This is an advisory from a Traffic Collision Avoidance System (TCAS) given to the flight crew recommending either a manoeuvre intended to provide separation from all traffic threats or a manoeuvre restriction intended to maintain existing separation.
AerospaceThe height of an aircraft above terrain immediately below the it taken from a Radio Altimeter.
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