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AIM

10/12/17

4−1−13

Services Available to Pilots

sight, the pilot will be instructed to follow the

preceding aircraft. THE ATC INSTRUCTION TO

FOLLOW THE PRECEDING AIRCRAFT DOES

NOT AUTHORIZE THE PILOT TO

 

COMPLY

WITH ANY ATC CLEARANCE OR INSTRUC-

TION ISSUED TO THE PRECEDING AIRCRAFT.

If other “nonparticipating” or “local” aircraft are in

the traffic pattern, the tower will issue a landing

sequence. If an arriving aircraft does not want radar

service, the pilot should state “NEGATIVE RADAR

SERVICE” or make a similar comment, on initial

contact with approach control.

(b) Pilots of departing VFR aircraft are

encouraged to request radar traffic information by

notifying ground control on initial contact with their

request and proposed direction of flight.

EXAMPLE−

Xray ground control, November One Eight Six, Cessna One

Seventy Two, ready to taxi, VFR southbound at 2,500, have

information bravo and request radar traffic information.

NOTE−

Following takeoff, the tower will advise when to contact

departure control.

(c) Pilots of aircraft transiting the area and in

radar contact/communication with approach control

will receive traffic information on a controller

workload permitting basis. Pilots of such aircraft

should give their position, altitude, aircraft call sign,

aircraft type, radar beacon code (if transponder

equipped), destination, and/or route of flight.

b. TRSA Service (Radar Sequencing and

Separation Service for VFR Aircraft in a TRSA).

1. This service has been implemented at certain

terminal locations. The service is advertised in the

Chart Supplement U.S. The purpose of this service is

to provide separation between all participating VFR

aircraft and all IFR aircraft operating within the

airspace defined as the Terminal Radar Service Area

(TRSA). Pilot participation is urged but is not

mandatory.

2. If any aircraft does not want the service, the

pilot should state “NEGATIVE TRSA SERVICE” or

make a similar comment, on initial contact with

approach control or ground control, as appropriate.

3. TRSAs are depicted on sectional aeronautical

charts and listed in the Chart Supplement U.S.

4. While operating within a TRSA, pilots are

provided TRSA service and separation as prescribed

in this paragraph. In the event of a radar outage,

separation and sequencing of VFR aircraft will be

suspended as this service is dependent on radar. The

pilot will be advised that the service is not available

and issued wind, runway information, and the time or

place to contact the tower. Traffic information will be

provided on a workload permitting basis.

5. Visual separation is used when prevailing

conditions permit and it will be applied as follows:

(a) When a VFR flight is positioned behind a

preceding aircraft and the pilot reports having that

aircraft in sight, the pilot will be instructed by ATC to

follow the preceding aircraft. Radar service will be

continued to the runway. THE ATC INSTRUCTION

TO FOLLOW THE PRECEDING AIRCRAFT

DOES NOT AUTHORIZE THE PILOT TO

COMPLY WITH ANY ATC CLEARANCE OR

INSTRUCTION ISSUED TO THE PRECEDING

AIRCRAFT.

(b) If other “nonparticipating” or “local”

aircraft are in the traffic pattern, the tower will issue

a landing sequence.

(c) Departing VFR aircraft may be asked if

they can visually follow a preceding departure out of

the TRSA. The pilot will be instructed to follow the

other aircraft provided that the pilot can maintain

visual contact with that aircraft.

6. VFR aircraft will be separated from VFR/IFR

aircraft by one of the following:

(a) 500 feet vertical separation.
(b) Visual separation.
(c) Target resolution (a process to ensure that

correlated radar targets do not touch).

7. Participating pilots operating VFR in a

TRSA:

(a) Must maintain an altitude when assigned

by ATC unless the altitude assignment is to maintain

at or below a specified altitude. ATC may assign

altitudes for separation that do not conform to

14 CFR Section 91.159. When the altitude assign-

ment is no longer needed for separation or when

leaving the TRSA, the instruction will be broadcast,

“RESUME APPROPRIATE VFR ALTITUDES.”

Pilots must then return to an altitude that conforms to

14 CFR Section 91.159 as soon as practicable.