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enhancement facility which provides pilots with operational information relevant to the
particular MBZ or CTAF area airspace and the aerodrome. The service is operated by
or for the aerodrome operator to published hours, on the MBZ frequency or CTAF
assigned to the particular aerodrome. It is not an Airservices –provided air traffic
service.
The service is not a separation service.
The call-sign of the service is the aerodrome location followed by "Radio"; eg, "Ayers
Rock Radio". The radio operators of the service have been certified to meet a CASA
standard of communication technique and aviation knowledge appropriate to the
service being provided.
When a CA/GRS is operating in an MBZ or CTAF area, pilot procedures are unchanged
from the standard MBZ/CTAF area operating and communication procedures.
The operational information provided by a CA/GRS assists pilots in making informed
operational decisions. Pilots retain authority and responsibility for the acceptance and
use of the information provided.
Aircraft making the normal inbound or taxiing broadcast receive a responding
broadcast from the CA/GRS operator, conveying the following information:
Confirmation of correct MBZ Frequency or CTAF selection.
Current known, relevant traffic in the MBZ or CTAF area and on the manoeuvering
area of the aerodrome. Traffic information may include some or all of the following:
•. the call-sign, aircraft type, position and intention; or
• where circuit flying is in operation, general advice on the number of aircraft in the
circuit, and position in the circuit if relevant.
Note: This information is provided to assist pilots in arranging self-separation.
200
Weather condition and operational information for the aerodrome. The information
which may be advised includes:
1. runway favoured by wind or for noise abatement,
2. wind direction and speed,
3. runway surface conditions,
4. aerodrome QNH,
5. aerodrome surface temperature, and
6. estimated cloud base and visibility
This information will be provided by means of an Automatic Aerodrome Information
Service (AAIS) broadcast on a discrete published frequency (similar to ATIS). Pilots
should monitor the published AAIS frequency before making the taxiing or inbound
broadcast and indicate that the AAIS information has been received when making the
inbound or taxiing broadcast.
Other operational information of a local nature, relevant to the safety of operations at
the aerodrome.
The CA/GRS will provide emergency services call-out if requested by the pilot in an
emergency or, if in the opinion of the operator, a call-out is warranted.
The CA/GRS satisfies the requirement for straight in approaches by commercial
passenger aircraft at non-controlled aerodromes where the provisions or CAO’s 82.3
and 82.5 apply.
The weather information provided by the service is derived from approved measuring
equipment, which meets BoM aeronautical precision standards. QNH provided by a
CA/GRS or AAIS may be used to reduce landing, circling and alternate minima in
accordance with ENR 1.5 para 5.3.1 (QNH Sources)
The CA/GRS operator may act as a representative of an air operator (where formal
agreement with the operator has been established) for the purposes of holding
SARWATCH.
Civil Aviation Safety Authority Australia
OPERATIONS
09/2001
3
CAGRS
SECTION
GENERAL INFORMATION
201
202
Civil Aviation Safety Authority Australia
OPERATIONS
09/2001
3
UNICOM
SECTION
GENERAL INFORMATION
UNICOM
UNICOM (Universal Communications) is a non-ATS communications service provided
on the MBZ frequency or CTAF to enhance the value of information normally available
about a non-controlled aerodrome.
The primary purpose of the frequencies used for UNICOM services (MBZ/CTAF) is for pilots
to be able to exchange relevant traffic information. Services available from a Unicom should
be considered as secondary and must not detract from the interchange of traffic
information between pilots.
Persons providing a Unicom service are required to be licensed by the Australian
Communication Authority (ACA). Detailed information regarding the licensing and use of
equipment may be obtained by contacting the ACA in the appropriate State or Territory
capital city.
Stations providing a Unicom service are required to be licensed by the Australian
Communication Authority (ACA). Detailed information regarding the licensing and use of
equipment may be obtained by contacting the ACA in the appropriate State or Territory
capital city.
Participation in Unicom services relates to the exchange of messages concerning:
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VFR Flight Guide(71)
