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• civil flights requiring passage through military airspace when weather conditions
or other factors make flight on the normal air route inadvisable,
or impossible, and when other routes are unavailable, or the use of such routes
would impose severe economic penalties on the operation of the aircraft.
There are two types of airspace reservations; fixed defined areas and “mobile”
(Eg, aerial refuelling, en route formation flights, etc). Such reservations are normally
only applied during limited periods. A designated airspace or portion thereof under the
control of a military ATC authority may also be reserved to confine particular activities.
In such airspace, RAAF ATC shall be responsible for the provision of separation for
transiting civil or military aircraft from the areas reserved or restricted for current air
defence operation.
GENERAL
Airspace in which a potential hazard to aircraft operations may exist, and all areas over
which the operation of civil aircraft may be restricted are promulgated as follows:
• Prohibited Area
Airspace within which the flight of aircraft is prohibited.
• Restricted Area
Airspace within which the flight of aircraft is restricted in accordance with specified
conditions.
• Danger Area
Airspace within which activities dangerous to the flight of aircraft may exist at
specified times.
These areas are promulgated in the DAH and are shown on MAP charts by boundaries
outlined in red and containing the identification of the area as a letter and a number.
The letters allocated are
P= Prohibited Area
R= Restricted Area
D= Danger area
The number identifies the area.
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Civil Aviation Safety Authority Australia
OPERATIONS
09/2001
3
GENERAL
SECTION
PRD
When used internationally, the identification of these areas are preceded by a FIR
identifier as follows;
Brisbane = YB
Melbourne = YM
Details are shown in ERSA or NOTAM
Unless otherwise specified, vertical limits are promulgated as AMSL when at or below
the transition altitude, or as a flight level when above the transition altitude.
The abbreviation “SFC” means the surface of the ground or water. “NOTAM” indicates
that the vertical limits or hours of activation will be notified by NOTAM.
The promulgated vertical limits of prohibited and restricted areas include all the buffers
necessary for the protection of aircraft operating outside these areas. Therefore, the
promulgated levels may be used by aircraft avoiding the areas, except where the
vertical limit abuts controlled airspace, in which case, a clearance is required.
FLIGHT WITHIN PRD AREAS
Flight within a prohibited area is not permitted in any circumstances.
Approval for an aircraft to fly within an active restricted area or airspace depends on
the location of the airspace and the type of activity being conducted in that area or
airspace, at the time. Pilots desiring access to a restricted area or airspace should
request clearance from ATC in the same manner that clearance to enter controlled
airspace is requested. Clearances are generally only witheld when activities hazardous
to the aircraft are taking place, or when military activities require absolute priority.
When clearance is granted, the flight must be conducted in accordance with the
conditions and instructions specified by the ATC unit.
Civil aircraft operating in military Restricted areas or airspace in which an ATC service is
provided will receive a service equivalent to that of Class C airspace unless specified
otherwise by ERSA FAC.
When compliance with an air traffic clearance requires flight:
• from controlled airspace into an adjoining active restricted area or airspace; or
• through an active restricted area or airspace into adjoining controlled airspace; or
• through an active restricted area or airspace within controlled airspace;
the pilot in command may assume that ATC has obtained approval for the flight. The
flight path must comply with prescribed controlled airspace procedures.
When flight within an active restricted area or airspace is required in
circumstances other than those specified in this section, operators must
submit a request to ATS for specific approval to enter.
Approval for flight within a danger area outside controlled airspace is
not required.
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Civil Aviation Safety Authority Australia
OPERATIONS
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GENERAL
SECTION
PRD
LANES OF ENTRY
Lanes of entry are established to permit passage to and from a GAAP CTR without
entering an adjacent civil or military CTR. The vertical limits provide separation from
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VFR Flight Guide(92)
