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Federal Aviation Administration

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The Federal Aviation Administration, or FAA, runs the nation's air traffic control system among other things.

Airport Diagrams

FAA Command and Control (C2) Radio System

From Southwest Region Spectrum Management Handbook SW 6050.12A December 12, 2001

Frequency  Input     Type  Ch 
172.9250   169.3250  R     1
172.9500   169.3500  R     2
172.9750   169.3750  R     3
172.8500   169.2500  R     4
172.8750   169.2750  R     5
172.9000   169.3000  R     6
172.8250   169.2250  R     7
172.1250             BM    8
172.1500             BM    9
172.1750             BM    10
166.1750             BM    11
172.9250             BM    12
172.9500             BM    13
172.9750             BM    14
172.8500             BM    15
172.8750             BM    16
172.9000             BM    17
172.8250             BM    18

FAA HF National Radio Communications System

Compiled from:


HF Regional Emergency Network.
HF Fixed service provides point-to-point (PTP) communications primarily in support of the National Radio Communications System (NRCS), known internally as Command and Control Communications (C3).
To provide for emergencies where catastrophic loss of wire communications might occur, long distance communications capability is needed. The Regional Emergency Network provides communication between ARTCC's, the Regional Office, the regional relocation site, other regions, and Civil Defense offices. This network is a part of the National and Civil Defense Emergency System. Authorized emissions are upper sideband (USB) or lower sideband (LSB), suppressed carrier resulting in a 3K00J3E characteristic or independent sideband (ISB) resulting in a 6K00B9W characteristic. To alleviate confusion, the carrier or dial frequency and the USB, LSB or ISB designator will be used when referring to these frequencies.

Ch	Freq (kHz)	Notes
00	4055.0		USB (East. U.S.)
01	4055.0		LSB (West. U.S.)
02	4625.0		USB; LSB
03	5860.0		USB
04	6870.0		USB (West. U.S.)
05	6870.0		LSB (East. U.S.)
06	7475.0		USB; LSB
07	7611.0		USB (East. U.S.)
08	7611.0		LSB (West. U.S.)
09	8125.0		USB (East U.S.)
10	8125.0		LSB (West. U.S.)
11 	9914.0		USB; LSB
12	11637.0		USB (East. U.S.)
13	11637.0		LSB (West. U.S.)
14	13457.0		USB (West. U.S.)
15	13457.0		LSB (East. U.S.)
16	13630.0		USB; LSB
17	15851.0		USB (East. U.S.)
18	15851.0		LSB (West. U.S.)
19	16348.0		USB; LSB
20	19410.0		USB (East. U.S.)
21	19410.0		LSB (West. U.S.)
22	20852.0		USB; LSB
23	24550.0		USB (West. U.S.)
24	24550.0		LSB (East. U.S.)
25	8912.0		USB; A/G FIFO use
26	11288.0		USB; A/G FIFO use
27	13312.0		USB; A/G FIFO use
28	17964.0		USB; A/G FIFO use
none	3428.0		USB: A/G FIFO use
none	5571.0		USB; A/G FIFO use
none	2866.0		USB; A/G Alaska only
none	3449.0		USB; A/G Alaska only
none	8855.0		USB; A/G Alaska only
none	11375.0		USB; A/G Alaska only


NOTES:

  • USB - upper sideband operation
  • LSB - lower sideband operation
  • Eastern U.S. is defined as East of the Mississippi River
  • Western U.S. is defined as West of the Mississippi River