AIM
4/20/23
pilot and controller communications. Prior to arriving at the destination radio facility, instructions will be
received from ARTCC to contact approach control on a specified frequency.
b. Radar Approach Control.
1.
Where radar is approved for approach control service, it is used not only for radar approaches (Airport
Surveillance Radar [ASR] and Precision Approach Radar [PAR]) but is also used to provide vectors in
conjunction with published nonradar approaches based on radio NAVAIDs (ILS, VOR, NDB, TACAN). Radar
vectors can provide course guidance and expedite traffic to the final approach course of any established IAP or
to the traffic pattern for a visual approach. Approach control facilities that provide this radar service will operate
in the following manner:
(a)
Arriving aircraft are either cleared to an outer fix most appropriate to the route being flown with
vertical separation and, if required, given holding information or, when radar handoffs are effected between the
ARTCC and approach control, or between two approach control facilities, aircraft are cleared to the airport or
to a fix so located that the handoff will be completed prior to the time the aircraft reaches the fix. When radar
handoffs are utilized, successive arriving flights may be handed off to approach control with radar separation in
lieu of vertical separation.
(b)
After release to approach control, aircraft are vectored to the final approach course (ILS, RNAV, GLS,
VOR, ADF, etc.). Radar vectors and altitude or flight levels will be issued as required for spacing and separating
aircraft.
Therefore, pilots must not deviate from the headings issued by approach control.
Aircraft will normally
be informed when it is necessary to vector across the final approach course for spacing or other reasons. If
approach course crossing is imminent and the pilot has not been informed that the aircraft will be vectored across
the final approach course, the pilot should query the controller.
(c)
The pilot is not expected to turn inbound on the final approach course unless an approach clearance
has been issued. This clearance will normally be issued with the final vector for interception of the final approach
course, and the vector will be such as to enable the pilot to establish the aircraft on the final approach course prior
to reaching the final approach fix.
(d)
In the case of aircraft already inbound on the final approach course, approach clearance will be issued
prior to the aircraft reaching the final approach fix. When established inbound on the final approach course, radar
separation will be maintained and the pilot will be expected to complete the approach utilizing the approach aid
designated in the clearance (ILS, RNAV, GLS, VOR, radio beacons, etc.) as the primary means of navigation.
Therefore, once established on the final approach course, pilots must not deviate from it unless a clearance to
do so is received from ATC.
(e)
After passing the final approach fix on final approach, aircraft are expected to continue inbound on
the final approach course and complete the approach or effect the missed approach procedure published for that
airport.
2.
ARTCCs are approved for and may provide approach control services to specific airports. The radar
systems used by these centers do not provide the same precision as an ASR/PAR used by approach control
facilities and towers, and the update rate is not as fast. Therefore, pilots may be requested to report established
on the final approach course.
3.
Whether aircraft are vectored to the appropriate final approach course or provide their own navigation
on published routes to it, radar service is automatically terminated when the landing is completed or when
instructed to change to advisory frequency at uncontrolled airports, whichever occurs first.
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4. Advance Information on Instrument Approach
a.
When landing at airports with approach control services and where two or more IAPs are published, pilots
will be provided in advance of their arrival with the type of approach to expect or that they may be vectored for
a visual approach. This information will be broadcast either by a controller or on ATIS. It will not be furnished
when the visibility is three miles or better and the ceiling is at or above the highest initial approach altitude
established for any low altitude IAP for the airport.
Arrival Procedures
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