different digital radio technologies. VHF 108–117.975 MHz This band was The ACMA will continue to LONG consider the impact of the allocated to the Low introduction of AM(R)S on aeronautical existing services by: mobile service Monitoring sharing studies between (AM(R)S) on a AM(R)S and VHF-FM primary basis at band radio broadcasting WRC-07 for LOS services applications, assessing compatibility including RNSS between GBAS/GRAS signal corrections. correction signals and This affects FM broadcasting. existing services in this band This band is also undergoing work as part of the digital switch-off 117.975–137 MHz Congestion Additional primary VHF LONG experienced in allocations made to the Low VHF aeronautical AM(R)S at WRC-07 are mobile bands at intended to alleviate Monitoring the the international congestion. However, the international level ACMA first needs to environment. consider the impact of the Sharing studies introduction of AM(R)S on underway. existing services. Deploying technology. VHF 121.5 EPIRBs phased 121.5 MHz may continue to MEDIUM MHz out of this be used for homing signals Medium frequency range to be received by aircraft and moved to 406 and rescue craft. The Monitoring MHz COSPAS-SARSAT satellite system no longer receives distress signals from distress beacons on 121.5 MHz. 137–144 MHz Channel 5A will VHF Switch off of analog SHORT not be used for television. High broadcasting services after the Monitoring switch-off of analog television VHF 156–174 MHz Maximise the to encourage the use of LONG efficiency of the single-channel operations Low VHF maritime and 12.5 kHz channel mobile band spacing, as well as the Monitoring introduction of new digital technologies.
different digital radio technologies. VHF 108–117.975 MHz This band was allocated to the aeronautical mobile service (AM(R)S) on a primary basis at WRC-07 for LOS applications, including RNSS signal corrections. This affects existing services in this band The ACMA will continue to consider the impact of the introduction of AM(R)S on existing services by: sharing studies between AM(R)S and VHF-FM band radio broadcasting services assessing compatibility between GBAS/GRAS correction signals and FM broadcasting. This band is also undergoing work as part of the digital switch-off LONG Low Monitoring VHF 117.975–137 MHz Congestion experienced in VHF aeronautical mobile bands at the international level Additional primary allocations made to the AM(R)S at WRC-07 are intended to alleviate congestion. However, the ACMA first needs to consider the impact of the introduction of AM(R)S on existing services. LONG Low Monitoring the international environment. Sharing studies underway. Deploying technology. VHF 121.5 MHz EPIRBs phased out of this frequency range and moved to 406 MHz 121.5 MHz may continue to be used for homing signals to be received by aircraft and rescue craft. The COSPAS-SARSAT satellite system no longer receives distress signals from distress beacons on 121.5 MHz. MEDIUM Medium Monitoring VHF 137–144 MHz Channel 5A will not be used for broadcasting services after the switch-off of analog television Switch off of analog television. SHORT High Monitoring VHF 156–174 MHz Maximise the efficiency of the VHF maritime mobile band to encourage the use of single-channel operations and 12.5 kHz channel spacing, as well as the introduction of new digital technologies. LONG Low Monitoring
five-year_spectrum_outlook_2012-2016%20docx.docx