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• Civil IFR flights OCTA not participating in RIS - 2000.
• Civil VFR flights OCTA not participating in RIS – 1200.
• Civil flights not involved in special operations or SAR operating OCTA in excess
of 15NM offshore – 4000
• Civil flights engaged in littoral (coastal) surveillance - 7615.
Pilots of flights which will require a RIS and/or a clearance into controlled airspace, and for
which
a discrete code has already been coordinated, must select that code
and “ALT” immediately prior to making their RIS /clearance request.
A pilot must not operate the special identification function "IDENT" (SPI) unless requested
by ATC.
A pilot departing from a radar controlled aerodrome must leave the transponder selected to
STANDBY until entering the departure runway, and on arrival select STANDBY or OFF as
soon as practicable after landing.
Civil Aviation Safety Authority Australia
OPERATIONS
09/2001
3 SECTION
GENERAL INFORMATION
ATC RADAR SERVICES
When operating in, or in the vicinity of a GAAP control zone
a transponder should be selected to:
• STANDBY - for flights wholly within a GAAP CTR,
• ALT - prior to take-off departing a GAAP CTR, or
• ALT - when operating in GAAP lanes of entry.
Pilots must select the transponder to STANDBY before effecting an SSR code change
and returning the transponder to ON/ALT.
Note: This action is required to prevent possible loss of diplayed aircraft position/label
information and possible misidentification of aircraft in automated Australian ATC
systems due to temporary selection (while effecting the change) of a code already in
use.
When acknowledging code setting instructions or changes to settings,
the pilot must read back the code to be set.
TRANSPONDER EMERGENCY CODES
The pilot of an aircraft encountering an emergency in flight, other than loss of twoway
communications, should select code 7700 unless he/she has specific reason to
believe that maintaining the assigned code would be the better course of action.
The pilot of an aircraft losing two-way communications must
set the transponder to code 7600. (See page 336)
TSET
TLA
NO
YBTS
FFO
IDENT
7 6 0 0
COMM FAILURE
TSET
TLA
NO
YBTS
FFO
IDENT
7 7 0 0
EMERGENCY
196
Civil Aviation Safety Authority Australia
OPERATIONS
09/2001
3 SECTION
GENERAL INFORMATION
ATC RADAR SERVICES
A radar controller observing a 7600 code shall request the pilot to operate the
identification (SPI function). If the identification signal is received, further control of the
aircraft will be continued using the identification transmission to acknowledge receipt
of instructions issued.
If the identification is not received, the aircraft must continue with the transponder on
code 7600 and follow radio failure procedures. (See page 336)
RADIO COMMUNICATIONS PROCEDURES
Pilots requesting radar services should address their request to the ATS unit with which
they are communicating.
Where an Area Approach Control Centre (AACC) is not established, the pilot will be
advised the time or place to transfer to radar.
Where an AACC is established, procedural and radar control may be provided on a
common frequency. The callsign identifies the service being provided -
eg. …CENTRE, …APPROACH,.. DEPARTURES
IDENTIFICATION PROCEDURES
Before exercising radar control there will be positive identification of the aircraft
concerned. However, radar services will not be provided until after the aircraft is within
controlled airspace.
RADAR VECTORING PROCEDURES
On receipt of radar heading instructions the pilot must, unless otherwise instructed,
immediately commence a rate 1 turn, or the standard rate of turn for the aircraft type,
and then maintain the heading given.
Aircraft will normally be vectored on route along which the pilot can monitor
navigation.
When an aircraft is given a vector which will take it off an established route,
the pilot will be advised of the reason for the vector, unless it is self evident.
When an aircraft reports unreliable directional instruments, the pilot will be requested,
prior to the issuance of manoeuvring instructions, to make all turns
at an agreed rate and to carry out the instructions immediately on receipt.
When aircraft are radar vectored, the controller will assign altitudes which allow for
terrain clearance. However, in VMC by day, an aircraft may be permitted to arrange its
own terrain clearance. In such instances the aircraft will be instructed to CLIMB (or
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VFR Flight Guide(69)
