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d. Radar navigation assistance (vectors) may be
initiated by the controller when one of the following
conditions exist:
1. The controller suggests the vector and the
pilot concurs.
2. A special program has been established and
vectoring service has been advertised.
3. In the controller’s judgment the vector is
necessary for air safety.
e. Radar navigation assistance (vectors) and other
radar derived information may be provided in
response to pilot requests. Many factors, such as
limitations of radar, volume of traffic, communications
frequency, congestion, and controller workload
could prevent the controller from providing it.
Controllers have complete discretion for determining
if they are able to provide the service in a particular
case. Their decision not to provide the service in a
particular case is not subject to question.
4−1−17. Terminal Radar Services for VFR
Aircraft
a. Basic Radar Service:
1. In addition to the use of radar for the control
of IFR aircraft, all commissioned radar facilities
provide the following basic radar services for VFR
aircraft:
(a) Safety alerts.
(b) Traffic advisories.
(c) Limited radar vectoring (on a workload
permitting basis).
(d) Sequencing at locations where procedures
have been established for this purpose and/or when
covered by a Letter of Agreement.
NOTE−
When the stage services were developed, two basic radar
services (traffic advisories and limited vectoring) were
identified as “Stage I.” This definition became
unnecessary and the term “Stage I” was eliminated from
use. The term “Stage II” has been eliminated in
conjunction with the airspace reclassification, and
sequencing services to locations with local procedures
and/or letters of agreement to provide this service have
been included in basic services to VFR aircraft. These
basic services will still be provided by all terminal radar
facilities whether they include Class B, Class C, Class D or
Class E airspace. “Stage III” services have been replaced
with “Class B” and “TRSA” service where applicable.
2. Vectoring service may be provided when
requested by the pilot or with pilot concurrence when
suggested by ATC.
3. Pilots of arriving aircraft should contact
approach control on the publicized frequency and
give their position, altitude, aircraft call sign, type
aircraft, radar beacon code (if transponder equipped),
destination, and request traffic information.
4. Approach control will issue wind and
runway, except when the pilot states “have numbers”
or this information is contained in the ATIS broadcast
and the pilot states that the current ATIS information
has been received. Traffic information is provided on
a workload permitting basis. Approach control will
specify the time or place at which the pilot is to
contact the tower on local control frequency for
further landing information. Radar service is
automatically terminated and the aircraft need not be
advised of termination when an arriving VFR aircraft
receiving radar services to a tower−controlled airport
where basic radar service is provided has landed, or
to all other airports, is instructed to change to tower
or advisory frequency. (See FAA Order 7110.65, Air
Traffic Control, paragraph 5−1−13, Radar Service
Termination.)
AIM 8/5/04
4−1−12 Services Available to Pilots
5. Sequencing for VFR aircraft is available at
certain terminal locations (see locations listed in the
Airport/Facility Directory). The purpose of the
service is to adjust the flow of arriving VFR and IFR
aircraft into the traffic pattern in a safe and orderly
manner and to provide radar traffic information to
departing VFR aircraft. Pilot participation is urged
but is not mandatory. Traffic information is provided
on a workload permitting basis. Standard radar
separation between VFR or between VFR and IFR
aircraft is not provided.
(a) Pilots of arriving VFR aircraft should
initiate radio contact on the publicized frequency
with approach control when approximately 25 miles
from the airport at which sequencing services are
being provided. On initial contact by VFR aircraft,
approach control will assume that sequencing service
is requested. After radar contact is established, the
pilot may use pilot navigation to enter the traffic
pattern or, depending on traffic conditions, approach
control may provide the pilot with routings or vectors
　
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