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AIM 

6/17/21 

(a) 

Name of the facility being called; 

(b) 

Your 

full

 aircraft identification as filed in 

the flight plan or as discussed in paragraph 4

2

4, 

Aircraft Call Signs; 

(c) 

When operating on an airport surface, 

state your position. 

(d) 

The type of message to follow or your 

request if it is short; and 

(e) 

The word “Over” if required. 

EXAMPLE

 

1. 

“New York Radio, Mooney Three One One Echo.” 

2. 

“Columbia Ground, Cessna Three One Six Zero 

Foxtrot, south ramp, I

F

R Memphis.” 

3. 

“Miami Center, Baron Five Six Three Hotel, request 

V

F

R traffic advisories.” 

2. 

Many FSSs are equipped with Remote 

Communications Outlets (RCOs) and can transmit on 
the same frequency at more than one location. The 
frequencies available at specific locations are 
indicated on charts above FSS communications 
boxes. To enable the specialist to utilize the correct 
transmitter, advise the location and the frequency on 
which you expect a reply. 

EXAMPLE

 

St. Louis FSS can transmit on frequency 122.3 at either 
Farmington, Missouri, or Decatur, Illinois, if you are in the 
vicinity of Decatur, your callup should be “Saint Louis 
radio, Piper Six Niner Six Yankee, receiving Decatur One 
Two Two Point Three.” 

3. 

If radio reception is reasonably assured, 

inclusion of your request, your position or altitude, 
and the phrase “(ATIS) Information Charlie 
received” in the initial contact helps decrease radio 
frequency congestion. Use discretion; do not 
overload the controller with information unneeded or 
superfluous. If you do not get a response from the 
ground station, recheck your radios or use another 
transmitter, but keep the next contact short. 

EXAMPLE

 

“Atlanta Center, Duke Four One Romeo, request V

F

traffic advisories, Twenty Northwest Rome, seven thousand 
five hundred, over.” 

b.  Initial Contact When Your Transmitting and 

Receiving Frequencies are Different. 

1. 

If you are attempting to establish contact with 

a ground station and you are receiving on a different 
frequency than that transmitted, indicate the VOR 
name or the frequency on which you expect a reply. 

Most FSSs and control facilities can transmit on 
several VOR stations in the area. Use the appropriate 
FSS call sign as indicated on charts. 

EXAMPLE

 

New York FSS transmits on the Kennedy, the Hampton, and 
the Calverton VORTACs. If you are in the Calverton area, 
your callup should be “New York radio, Cessna Three One 
Six Zero Foxtrot, receiving Calverton V

O

R, over.” 

2. 

If the chart indicates FSS frequencies above 

the VORTAC or in the FSS communications boxes, 
transmit or receive on those frequencies nearest your 
location. 

3. 

When unable to establish contact and you 

wish to call 

any

 ground station, use the phrase “ANY 

RADIO (tower) (station), GIVE CESSNA THREE 
ONE SIX ZERO FOXTROT A CALL ON 
(frequency) OR (V

O

R).” If an emergency exists or 

you need assistance, so state. 

c.  Subsequent Contacts and Responses to 

Callup from a Ground Facility. 

Use the same format as used for the initial contact 
except you should state your message or request with 
the callup in one transmission. The ground station 
name and the word “Over” may be omitted if the 
message requires an obvious reply and there is no 
possibility for misunderstandings. 

You should 

acknowledge all callups or clearances

 unless the 

controller or FSS specialist advises otherwise. There 
are some occasions when controllers must issue 
time-critical instructions to other aircraft, and they 
may be in a position to observe your response, either 
visually or on radar. If the situation demands your 
response, take appropriate action or immediately 
advise the facility of any problem. Acknowledge with 
your aircraft identification, either at the beginning or 
at the end of your transmission, and one of the words 
“Wilco,” “Roger,” “Affirmative,” “Negative,” or 
other appropriate remarks; e.g., “PIPER TWO ONE 
FOUR LIMA, ROGER.” If you have been receiving 
services; e.g., VFR traffic advisories and you are 
leaving the area or changing frequencies, advise the 
ATC facility and terminate contact. 

d.  Acknowledgement of Frequency Changes. 

1. 

When advised by ATC to change frequencies, 

acknowledge the instruction. If you select the new 
frequency without an acknowledgement, the control-
ler’s workload is increased because there is no way of 
knowing whether you received the instruction or have 
had radio communications failure. 

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Radio Communications Phraseology