Also known as: RA#, RA...
RA has various meanings in the Governmental & Military category. Discover the full forms, definitions, and usage contexts of RA in Governmental & Military.
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.
Governmental & MilitaryThe height of an aircraft above terrain immediately below the it taken from a Radio Altimeter.
Governmental & MilitaryA registration authority (RA) is an authority in a network that verifies user requests for a digital certificate and tells the certificate authority (CA) to issue it. RAs are part of a public key infrastructure (PKI), a networked system that enables companies and users to exchange information and money safely and securely. The digital certificate contains a public key that is used to encrypt and decrypt messages and digital signatures.
Governmental & MilitaryProcess of analyzing threats to and vulnerabilities of an information system, and the potential impact resulting from the loss of information or capabilities of a system. This analysis is used as a basis for identifying appropriate and cost-effective security countermeasures.
Governmental & MilitaryThe altitude of an aircraft as determined by radar–type radio altimeter thus the actual distance from the nearest terrain feature.
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