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6 – i ndex
ATSSurveillanceSystem:
Ageneric termmeaningvariously,
ADS-B, PSR, SSRor any comparableground-based system that
enables the identificationof aircraft.
Note: A comparableground-based system is one that has been
demonstrated, by comparativeassessment
or othermethodology, tohavea level of safetyand
performance equal to, or better than,monopulseSSR.
AutomaticDependentSurveillance - Broadcast (ADS-B):
A
means bywhich aircraft, aerodrome vehicles andother objects can
automatically transmit or receivedata such as identification, position
andadditional data, as appropriate, in abroadcastmode via adata
link.
AutomaticDependentSurveillance - Contract (ADS-C):
A
means bywhich the terms of anADS-Cagreementwill be exchanged
between theground system and theaircraft, viaadata link, specifying
underwhat conditionsADS-C reportswouldbe initiated, andwhat
datawouldbe contained in the reports.
AutomaticEnRoute InformationService (AERIS):
Theprovision
of operational information en routebymeans of continuous and
repetitivebroadcasts.
AutomaticTerminal InformationService (ATIS):
Theprovision
of current, routine information to arriving anddepartingaircraft by
means of continuous and repetitivebroadcasts during thehourswhen
theunit responsible for the service is inoperation.
AviationReferenceNumber (ARN):
Aunique six-digit number used
to identify a clientwho conducts businesswithCASA.WhenCASA
receives an application for anew licence, certificate, or other service,
anARN is established and all subsequent transactions for the client
are recorded against that ARN. In addition tobeing a client number,
theARNmay alsobe the licenceor certificatenumber. TheARN
shouldbequoted inall correspondencewithCASAorwithAirservices
PublicationsUnit.
BaseTurn (InstrumentApproach):
A turnexecutedby theaircraft
during the initial approachbetween theendof theoutbound track and
thebeginningof the intermediateor final approach track. The tracks
arenot reciprocal.
definitions