AIM 

6/17/21 

occurs after departing the parking area, watch the 
tower for light signals or monitor tower frequency. 

REFERENCE

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14 CFR Section 91.125 and 14 CFR Section 91.129. 

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14.  Communications for VFR Flights 

a. 

FSSs and Supplemental Weather Service 

Locations (SWSL) are allocated frequencies for 
different functions; for example, in Alaska, certain 
FSSs provide Local Airport Advisory on 123.6 MHz 
or other frequencies which can be found in the Chart 
Supplement U.S. If you are in doubt as to what 
frequency to use, 122.2 MHz is assigned to the 

majority of FSSs as a common en route simplex 
frequency. 

NOTE

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In order to expedite communications, state the frequency 
being used and the aircraft location during initial callup. 

EXAMPLE

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Dayton radio, November One Two Three Four Five on one 
two two point two, over Springfield V

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O

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R, over. 

b. 

Certain VOR voice channels are being utilized 

for recorded broadcasts; for example, ATIS. These 
services and appropriate frequencies are listed in the 
Chart Supplement U.S. On VFR flights, pilots are 
urged to monitor these frequencies. When in contact 
with a control facility, notify the controller if you plan 
to leave the frequency to monitor these broadcasts. 

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Radio Communications Phraseology