AIM ¶ 4-1-11 — UNICOM/MULTICOM Frequencies

Frequency use The following listing depicts UNICOM and MULTICOM frequency uses as designated by the Federal Communications Commission (FCC). (See TBL 4-1-2 .) TBL 4-1-2 Unicom/Multicom Frequency Usage 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. The following listing depicts other frequency uses as designated by the Federal Communications Commission (FCC). (See TBL 4-1-3 .) TBL 4-1-3 Other Frequency Usage Designated by FCC 1 This frequency is available only to itinerant stations that have a requirement to be periodically transferred to various locations. 2 Mobile station operations on these frequencies are limited to an area within 320 km (200 mi) of an associated flight test land station.