4-1-11 Designated UNICOM/MULTICOM Frequencies
AIM Chapter 4. Air Traffic Control — Section 4-1, Services Available to Pilots
Official text — AIM 4-1-11
AIM — FAA OPERATIONAL GUIDANCEFrequency use
a. The following listing depicts UNICOM and MULTICOM frequency uses as designated by the Federal Communications Commission (FCC). (See TBL 4-1-2.)
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 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 4-1-3.)
Use | Frequency
Air‐to‐air communication (private fixed wing aircraft). | 122.750
Helicopter air-to-air communications; air traffic control operations. | 123.025
Aviation instruction, Glider, Hot Air Balloon (not to be used for advisory service) . | 123.300 123.500
Assignment to flight test land and aircraft stations (not for air-to-air communication except for those aircraft operating in an oceanic FIR). | 123.400 1 123.450 2
1This frequency is available only to itinerant stations that have a requirement to be periodically transferred to various locations.
2Mobile station operations on these frequencies are limited to an area within 320 km (200 mi) of an associated flight test land station.
Reproduced from the FAA Aeronautical Information Manual (Basic (with Change 3)). The AIM is FAA guidance, not regulation. Verify against the official source before relying on it operationally.
Is this a regulation?
No — this is FAA guidance, not a regulation.
Aeronautical Information Manual. FAA operational guidance and recommended practices. The AIM is not regulatory, although it often explains how to comply with regulations.