Aeronautical Information Manual (AIM), page 340

Index   339 -- Page 340 -- 341


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


(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 estab-
lished 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 appropri-
ate 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

5-4-4. Advance Information on Instrument

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.
b. The purpose of this information is to aid the
pilot in planning arrival actions; however, it is not an
ATC clearance or commitment and is subject to
change. Pilots should bear in mind that fluctuating
weather, shifting winds, blocked runway, etc., are
conditions which may result in changes to approach
information previously received. It is important that
pilots advise ATC immediately they are unable to
execute the approach ATC advised will be used, or if
they prefer another type of approach.

c. Aircraft destined to uncontrolled airports,
which have automated weather data with broadcast
capability, should monitor the ASOS/AWSS/AWOS
frequency to ascertain the current weather for the air-
port. The pilot must advise ATC when he/she has
received the broadcast weather and state his/her
1. ASOS/AWSS/AWOS should be set to provide one-
minute broadcast weather updates at uncontrolled airports
that are without weather broadcast capability by a human
2. Controllers will consider the long line disseminated
weather from an automated weather system at an
uncontrolled airport as trend and planning information
only and will rely on the pilot for current weather
information for the airport. If the pilot is unable to receive
the current broadcast weather, the last long line
disseminated weather will be issued to the pilot. When
receiving IFR services, the pilot/aircraft operator is
responsible for determining if weather/visibility is
adequate for approach/landing.
d. When making an IFR approach to an airport not
served by a tower or FSS, after ATC advises
PROVED" you should broadcast your intentions,
including the type of approach being executed, your
position, and when over the final approach fix

5-4-4 Arrival Procedures

Page 340 of the Aeronautical Information Manual (AIM.pdf)
AIM: Official Guide to Basic Flight Information and ATC Procedures

Index   339 -- Page 340 -- 341