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UNEXPECTED DETERIORATION BELOW THE IFR ALTERNATE MINIMA”.
“ALL STATIONS HAZARD ALERT DUBBO. Pilot reports unexpected deterioration below
the VFR alternate minima”.
Note: Broadcasts will normally be made on receipt, H+15, and H+45.
When appropriate, ATC towers may provide advice about Hazard Alert Information on
the ATIS.
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FLIGHT INFORMATION SERVICE
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WEATHER RADAR
Weather radar data derived from BoM radar sites is displayed at various ATS working
positions by means of a PC-based system known within Airservices as METRAD and
within the military as RAPIC.
METRAD/RAPIC images are not ‘real time’ but are the results of a ten minute update
cycle. The most effective range of the radars is up to 75NM.
Weather radar sites, which may be utilised by ATS, are shown in ERSA MET. Weather
radar information within 75NM of radar sites is available to pilots, subject to ATS
workload, on request.
When providing METRAD/RAPIC information to pilots, ATS will use the prefix “MET
RADAR DISPLAY INDICATES..”
INFORMATION BY PILOTS
A pilot in command becoming aware of any irregularity of operation of any
navigational or communications facility or service or other hazard to navigation must
report the details as soon as practicable. Reports must be made to the appropriate ATS
unit, except that defects, or hazards on a landing area must be reported to the person
or authority granting use of the area.
When a landing is made on a water-affected runway, the pilot is requested to advise
ATS of the extent of water on the runway and the braking characteristics experienced.
The following terms should be used to describe water on a runway:
DAMP - The surface shows a change of colour due to moisture.
WET - The surface is soaked but there is no standing water.
WATER PATCHES - Patches of standing water are visible.
FLOODED - Extensive standing water is visible.
The following terms should be used to describe braking characteristics experienced:
GOOD - Pilots should not expect to find the conditions as good as when operating on
a dry runway, but should not experience any directional control or braking
difficulties because of runway conditions.
MEDIUM - Braking action may be such that the achievement of a satisfactory landing
or accelerate- stop performance, taking into account the prevailing
circumstances, depends on precise handling technique.
POOR -There may be a significant deterioration both in braking performance and
directional control.
During the bush fire danger period, pilots in command of an aircraft should notify the
nearest ATS unit promptly of any evidence of bush fires observed which they believe
have not been reported previously.
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METEOROLOGICAL BRIEFING
A limited elaborative briefing service is available from Regional Forecasting Centres
(RFCs) on the following telephone numbers:
Adelaide 08 8366 2617
Cairns 07 4035 9777
Brisbane 07 3229 1854
Darwin 08 8982 2824
Hobart 03 6221 2000
Melbourne 03 9669 4850
Perth 08 9263 2255
Sydney 02 9296 1527
Townsville 07 4779 5999
AVAILABILITY OF METEOROLOGICAL DOCUMENTATION
Available documents include the following:
• mean sea level analysis and prognosis charts
• upper level analysis and prognosis charts
• satellite imagery
• grid point winds and temperatures
• route sector winds and temperatures and
• significant weather charts
• Domestic TAF: Domestic Area Forecasts (ARFOR); AREA QNH
• International TAF Bulletins according to major route corridors
• Selected route forecast for high density route
• SIGMET, AIRMET and VOLCANIC ASH DEVICES
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PREFLIGHT INFORMATION AND FLIGHT NOTIFICATION
GENERAL
Preflight information and flight notification and distribution service is provided from
the National Aeronautical Information Processing System (NAIPs) for PC users, or can
be accessed on a continuous leased line basis to company operation. The service is also
provided twenty four hours from the Brisbane and Melbourne briefing offices. This
service is based on telephone and facsimile communication. A self help electronic
briefing service is also available to the aviation industry. A face to face service is not
　
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