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AIM 

4/20/23

 

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Summary of Recommended Communication Procedures

Communication/Broadcast Procedures

Facility at Airport

Frequency Use

Outbound

Inbound

Practice

Instrument

Approach

1. UNICOM (No Tower or

FSS)

Communicate with UNICOM
station on published CTAF
frequency (122.7; 122.8; 122.725;
122.975; or 123.0). If unable to
contact UNICOM station, use
self-announce procedures on
CTAF.

Before taxiing and
before taxiing on
the runway for
departure.

10 miles out.
Entering
downwind, base,
and final. Leaving
the runway.

2. No Tower, FSS, or

UNICOM

Self-announce on MULTICOM
frequency 122.9.

Before taxiing and
before taxiing on
the runway for
departure.

10 miles out.
Entering
downwind, base,
and final. Leaving
the runway.

Departing final
approach fix
(name) or on final
approach segment
inbound.

3. No Tower in operation,

FSS open (Alaska only)

Communicate with FSS on CTAF
frequency.

Before taxiing and
before taxiing on
the runway for
departure.

10 miles out.
Entering
downwind, base,
and final. Leaving
the runway.

Approach com-
pleted/terminated.

4. FSS Closed (No Tower)

Self-announce on CTAF.

Before taxiing and
before taxiing on
the runway for
departure.

10 miles out.
Entering
downwind, base,
and final. Leaving
the runway.

5. Tower or FSS not in

operation

Self-announce on CTAF.

Before taxiing and
before taxiing on
the runway for
departure.

10 miles out.
Entering
downwind, base,
and final. Leaving
the runway.

6. Designated CTAF Area

(Alaska Only)

Self-announce on CTAF
designated on chart or Chart
Supplement Alaska.

Before taxiing and
before taxiing on
the runway for
departure until
leaving designated
area.

When entering
designated CTAF
area.

2. CTAF (Alaska Only)

. In Alaska, a CTAF may also be designated for the purpose of carrying out

advisory practices while operating in designated areas with a high volume of VFR traffic.

3.

The CTAF frequency for a particular airport or area is contained in the Chart Supplement U.S., Chart

Supplement Alaska, Alaska Terminal Publication, Instrument Approach Procedure Charts, and Instrument
Departure Procedure (DP) Charts. Also, the CTAF frequency can be obtained by contacting any FSS. Use of the
appropriate CTAF, combined with a visual alertness and application of the following recommended good
operating practices, will enhance safety of flight into and out of all uncontrolled airports.

c. Recommended Traffic Advisory Practices

1.

Pilots of inbound traffic should monitor and communicate as appropriate on the designated CTAF from

10 miles to landing. Pilots of departing aircraft should monitor/communicate on the appropriate frequency from
start-up, during taxi, and until 10 miles from the airport unless the CFRs or local procedures require otherwise.

2.

Pilots of aircraft conducting other than arriving or departing operations at altitudes normally used by

arriving and departing aircraft should monitor/communicate on the appropriate frequency while within 10 miles
of the airport unless required to do otherwise by the CFRs or local procedures. Such operations include parachute
jumping/dropping, en route, practicing maneuvers, etc.