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Communications is evolving with satellite-based technology.
Common regional virtual network
Work is underway to establish a common regional virtual private network (CRV) in the Asia/Pacific region for improved ground to ground communications. This internet protocol based network will provide a more cost effective, flexible and advanced solution to overcome limitations with the current system of multiple point-to-point connections for the air traffic service message handling system (AMHS).
Performance-based communications and surveillance
Required communication performance (RCP) and required surveillance performance (RSP) specifications can now be applied along with required navigation performance (RNP) specifications in some international airspace for certain separation standards.
RCP 240 and RSP 180 relate to the satellite-based systems controller-pilot datalink communications (CPDLC) and automatic dependent surveillance–contract (ADS-C).
Performance-based communications and surveillance (PBCS) routes have been implemented on some routes in the North Atlantic and Asia-Pacific regions and may be implemented in Australian airspace in future, where CPDLC and ADS-C are used. Aircraft operating in international airspace where PBCS routes exist may need authorisation from their state of registry or state of operator.
A CASA regulatory instrument (CASA 33/18) describes the aircraft equipment, documentation and personnel training required for an operator to declare their RCP 240 and RSP 180 capability. Read the advisory circular for more information.
Once the operator has confirmed the aircraft’s avionics, documentation and personnel training is compliant for PBCS operations, no further documentation from CASA is required. RCP 240 and RSP 180 descriptors must also be included in the flight plan.
Other emerging communications technology is enabling greater use of datalink communications in lieu of the legacy VHF and HF voice communication systems. However, for most operations the primary means of communications will continue to be VHF and HF voice.