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AIM

10/12/17

4−1−6

Services Available to Pilots

FINAL (as appropriate) FOR RUNWAY ONE NINER (full

stop/touch−and−go) FREDERICK.

FREDERICK TRAFFIC CESSNA EIGHT ZERO ONE

TANGO FOXTROT CLEAR OF RUNWAY ONE NINER

FREDERICK.

(b) Outbound

PHRASEOLOGY−

FREDERICK UNICOM CESSNA EIGHT ZERO ONE

TANGO FOXTROT (location on airport) TAXIING TO

RUNWAY ONE NINER, REQUEST WIND AND TRAFFIC

INFORMATION FREDERICK. 

FREDERICK TRAFFIC CESSNA EIGHT ZERO ONE

TANGO FOXTROT DEPARTING RUNWAY ONE NINER.

“REMAINING IN THE PATTERN” OR “DEPARTING

THE PATTERN TO THE (direction) (as appropriate)”

FREDERICK.

4−1−10. IFR Approaches/Ground Vehicle

Operations

a. IFR Approaches. When operating in accor-

dance with an IFR clearance and ATC approves a

change to the advisory frequency, make an

expeditious change to the CTAF and employ the

recommended traffic advisory procedures.

b. Ground Vehicle Operation. Airport ground

vehicles equipped with radios should monitor the

CTAF frequency when operating on the airport

movement area and remain clear of runways/taxi-

ways being used by aircraft. Radio transmissions

from ground vehicles should be confined to

safety-related matters.

c. Radio Control of Airport Lighting Systems.

Whenever possible, the CTAF will be used to control

airport lighting systems at airports without operating

control towers. This eliminates the need for pilots to

change frequencies to turn the lights on and allows a

continuous listening watch on a single frequency. The

CTAF is published on the instrument approach chart

and in other appropriate aeronautical information

publications. For further details concerning radio

controlled lights, see AC 150/5340−27, Air−to−

Ground Radio Control of Airport Lighting Systems.

4−1−11. Designated UNICOM/MULTICOM

Frequencies
Frequency use

a. The following listing depicts UNICOM and

MULTICOM frequency uses as designated by the

Federal Communications Commission (FCC). 

(See TBL 4−1−2.)

TBL 4−1−2

Unicom/Multicom Frequency Usage

Use

Frequency

Airports without an operating

control tower.

122.700

122.725

122.800

122.975

123.000

123.050

123.075

(MULTICOM FREQUENCY)

Activities of a temporary, seasonal,

emergency nature or search and

rescue, as well as, airports with no

tower, FSS, or UNICOM.

122.900

(MULTICOM FREQUENCY)

Forestry management and fire

suppression, fish and game

management and protection, and

environmental monitoring and

protection.

122.925

Airports with a control tower or

FSS on airport.

122.950

NOTE−

1. In some areas of the country, frequency interference

may be encountered from nearby airports using the same

UNICOM frequency. Where there is a problem, UNICOM

operators are encouraged to develop a “least interfer-

ence” frequency assignment plan for airports concerned

using the frequencies designated for airports without

operating control towers. UNICOM licensees are

encouraged to apply for UNICOM 25 kHz spaced channel

frequencies. Due to the extremely limited number of

frequencies with 50 kHz channel spacing, 25 kHz channel

spacing should be implemented. UNICOM licensees may

then request FCC to assign frequencies in accordance with

the plan, which FCC will review and consider for approval.
2. Wind direction and runway information may not be
available on UNICOM frequency 122.950.

b. The following listing depicts other frequency

uses as designated by the Federal Communications

Commission (FCC).  (See TBL 4−1−3.)