Radio Spectrum
Where can aviation signals be found?

Aviation Radio Bands and Frequencies

A large number of aviation frequencies can be received by the Kenwood R-5000 receiver at this website.

Types of Aviation Radio Signals Some aviation signals can be classified as being purely for navigation (NAV) or communication (COM), but others are used for both. For example, some aircraft navigation beacons and VHF Omnirange (VOR) navigation stations also transmit voice communications.

The Low Frequency (LF) Aviation Band
Low frequencies were very important to air navigation years ago, but became increasingly less important as more reliable systems operating at higher frequencies were developed and became widely available. Many Low Frequency navigation beacons were decommissioned long ago because of that. The few that remain primarily provide backup navigation in the event of primary navigation system failures, although some are used routinely even today in the execution of instrument landings.

Long ago, before VHF Omnirange (VOR) and other superior navigation systems were developed, that band contained AN Radio Ranges and Non-Directional Beacons (NDB's). 344 AN Radio Ranges still existed in the United States in 1959, but none exist today. Some NDB's are all that remain.

The Low Frequency (LF) aviation band extends from 200 kHz to 415 kHz with some internal gaps assigned to other services. The entire Low Frequency (LF) aviation band can be received by the receiver at this website.

Medium Frequency Aviation Band Usage
The only portion of the Medium Frequency spectrum allocated for aviation use is the 2850 to 3000 kHz portion of the 2850 to 3155 kHz Aviation Band. However, most aircraft are equipped with radio direction finders than can receive Medium Frequency AM Broadcast Band.

High Frequency (HF) Aviation Bands
High Frequencies were widely used for domestic aircraft voice communications years ago. Nearly all that traffic moved to Very High Frequencies long ago and domestic aircraft use of Medium Frequencies is now very rare. However, international flights still use the High Frequencies bands routinely for voice communications, because of the much longer distances over which they can be used. All these frequencies can be received by the receiver at this website.

High Frequency Aviation Bands
Frequency BandAllocationSLC Receiver
3155 kHz
Aviation (2850 to 3000 portion is MF)Yes
3500 kHz
Aviation SSB (3 KHz Channel spacing)Yes
4750 kHz
5730 kHz
Aviation SSB (3 KHz Channel spacing)Yes
6765 kHz
9040 kHz
Aviation USB (3 KHz Channel spacing)Yes
10100 kHz
11400 kHz
Aviation USB (3 KHz Channel spacing)Yes
13360 kHz
Aviation SSB (3 KHz Channel spacing)Yes
15100 kHz
18030 kHz
21000 kHz
Aviation & InternationalYes
22000 kHz
21964 kHzAviation SSB Aviation PacificYes
23200 kHz
Fixed Aviation & InternationalYes
23350 kHz
24890 kHz
Fixed Aviation & InternationalYes

Very High Frequency (VHF) Civil Aviation Band
The VHF Civil Aviation Band extends from 108 to 136 MHz with theallocations shown below.

The VHF 108 to 136 MHz Civil Aviation Band
FrequenciesllocationSLC Receiver
112.000 MHz
Aviation Terminal VOR and ILS Navigation (80 Channels)Yes
117.950 MHz
Aviation VOR Navigation (120 Channels)Yes
136.000 MHz
Aviation Communication (720 Channels)Yes
121.500 MHzAviation DistressYes
121.600 MHzCivil Air Patrol (Authorized use only)Yes
121.700 MHzAviation Ground ControlYes
121.400 MHz
Air Traffic Control (Towers and ARTCC's)Yes
121.600 MHzCivil Air Patrol Training BeaconsYes
121.650 MHzAviation Ground ControlYes
121.700 MHzAviation Ground ControlYes
121.750 MHzAviation Ground ControlYes
121.775 MHzCivil Air Patrol Training BeaconsYes
121.800 MHzAviation Ground ControlYes
121.850 MHzAviation Ground ControlYes
121.900 MHzAviation Ground ControlYes
121.900 MHzFlight SchoolsYes
121.957 MHzFlight Service StationsYes
122.000 MHzFlight Advisory ServiceYes
122.675 MHz
Flight Service StationsYes
122.250 MHzBalloonsYes
122.400 MHzFlight Service StationsYes
122.600 MHzFlight Service StationsYes
122.700 MHzAviation UNICOM Uncontrolled AirportsYes
122.725 MHzAviation UNICOM Private AirportsYes
122.750 MHzAviation Air to Air CommunicationsYes
122.775 MHzAir Shows & Air-to-air CommunicationsYes
122.800 MHzAviation UNICOM Uncontrolled AirportsYes
122.825 MHzARINCYes
122.850 MHzAviation MulticomYes
122.875 MHzARINCYes
122.900 MHzAviation UNICOM Uncontrolled Airports and Search and Rescue TrainingYes
122.925 MHzAviation UNICOM/Multicom/Air ShowsYes
122.950 MHzAviation UNICOM Controlled AirportsYes
122.975 MHzAviation UNICOMYes
122.975 MHzAirplane to Airplane (high altitude airliners)Yes
123.000 MHzAviation UNICOMYes
123.050 MHzAviation UNICOMYes
123.050 MHzAviation HeliportsYes
123.075 MHzAviation UNICOMYes
123.075 MHzAviation HeliportsYes
123.000 MHzAviation UNICOM Uncontrolled airportsYes
123.025 MHzHelicopters Air-to-air CommunicationsYes
123.050 MHzAviation UNICO HeliportsYes
123.075 MHzAviation UNICOM HeliportsYes
123.100 MHzSearch and Rescue/Civil Air PatrolYes
123.476 MHz
Flight TestYes
123.200 MHzFlight SchoolsYes
123.300 MHzFlight Schools & BalloonsYes
123.325 MHzAir ShowsYes
123.350 MHzNASAYes
123.400 MHzFlight SchoolsYes
123.425 MHzAir ShowsYes
123.450 MHzAir to Air (trans-ocean unofficial)Yes, but out of range
123.475 MHzU.S. Army Golden KnightsYes
123.500 MHzFlight Schools & BalloonsYes
123.575 MHz
Flight testingYes
128.800 MHz
Air Traffic Control (Towers/ARTCC's)Yes
126.200 MHzMilitary Airport TowersYes
128.625 MHzNASA/NOAA ResearchYes
132.000 MHz
130.650 MHzMilitary Airlift CommandYes
134.100 MHzMilitary Airports - Ground Control Approach (GCA) RadarYes
135.850 MHzFederal Aviation Administration (FAA)Yes
135,950 MHzFederal Aviation Administration (FAA)Yes

Other Aviation-Related VHF Frequencies
FrequencyAllocationSLC Receiver
136.975 MHz
Air Control/Unicom/Future UseYes
148.125 MHzCivil Air Patrol Repeaters - SecondaryYes
148.150 MHzCivil Air Patrol Repeaters - PrimaryYes
156.300 MHzAircraft-to-Ship - SafetyYes, but out of range
156.400 MHzAircraft-to-Ship - CommercialYes, but out of range
156.425 MHzAircraft-to-Ship - Non-CommercialYes, but out of range
156.450 MHzAircraft-to-Ship - CommercialYes, but out of range
156.625 MHzAircraft-to-Ship - Non-CommercialYes, but out of range
156.690 MHzAircraft-to-Ship - CommercialYes, but out of range

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