AIM 

4/20/23 

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

. 

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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

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2.) 

TBL 4

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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

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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 interference” 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

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3.) 

Services Available to Pilots 

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