4.2  Availability
4.2.1 The availability of a radar control service can be affected by controller workload limitations. Consequently, the radar controller is responsible for determining the extent of service that can be provided at a particular time. The provision of a radar control service has priority over the provision of a radar flight information service.
4.2.2 Where installed, radar is used to the maximum extent practicable in the provision of area and approach control service. Accordingly, when within radar cover, controlled flights may expect to receive a radar control service at most times without specific advice to this effect. Radar units providing area and approach control service use the word “CONTROL”in their callsign whether or not radar service is being provided at the particular time. However, when a specific radar service is being provided on a discrete RTF frequency, the service will be identified by including in the callsign the word “RADAR”.

4.3  Radar Identification
4.3.1 Before taking any action based on radar information, the radar controller will establish radar identification of the aircraft concerned and identification will be maintained until termination of the radar service.
4.3.2  Identification will be achieved by such methods as:
(a)  
requiring the aircraft to carry out clearly defined manoeuvres;

(b)  
correlating a particular radar position symbol with an aircraft reporting its position by reference to navigation aids or a visual fix;

(c)  
requiring aircraft to set a particular SSR Code or squawk IDENT; or

(d)  
in the case of departing aircraft, observing the aircraft in the correct position in relation to the take-off runway shortly after take-off.

4.3.3 The aircraft will be advised when radar identification has been achieved and, if radar identification is subsequently lost, the aircraft will be advised accordingly.

4.4 Radar Services to IFR Flights
4.4.1 Radar Control and Radar Flight Information Services, as appropriate, are provided to IFR flights within radar coverage in Class A, C, and D airspace.
4.4.2 A radar FIS service is provided to IFR flights in Class G airspace within radar coverage.

4.5 Radar Services to VFR Flights
4.5.1 Radar Control and Radar Flight Information Services, as appropriate, are provided to VFR flights under area or approach control within radar coverage in Class C and Class D airspace.
4.5.2 Radar services are not normally provided to VFR flights within radar coverage operating in Class G airspace. Every effort will be made to provide a service if requested, but it will be limited to:
(a)
assisting aircraft experiencing an emergency; and

(b)
giving navigational assistance.

4.5.3 The use of radar by ATC does not absolve the pilot from compliance with the requirements for operation under VFR. Terrain clearance remains the responsibility of the pilot.
4.5.4 Should pilots operating under VFR encounter a situation where their ability to remain clear of terrain is compromised, any requests for assistance from ATS must include details of the circumstances.

4.6 Radar Control
4.6.1 Radar control is the term used to indicate that radar derived information is employed directly in the provision of an ATC service.

4.7 Radar Vectoring
4.7.1 Radar vectoring occurs when the radar controller instructs the pilot to steer magnetic headings that will enable an aircraft to maintain a desired track. To minimise the amount of navigation under radar control, and to facilitate the restoration of pilot navigation in the event of radar failure, aircraft will, when practicable, be vectored on routes that can be related to a pilot interpreted navigation aid.
　
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