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== Common VHF Frequencies ==
+
Aircraft use [https://en.wikipedia.org/wiki/Airband Airband] as their primary means of voice communication. In North America, the spectrum from 118.000 to 136.975 MHz is used with 25 kHz spacing and [[Modulation_Methods#Amplitude_Modulation|AM]]. As of 2010 aeronautical enroute and flight test stations may use 8.33 kHz spaced channels in the 121.4-123.6, 128.825-132.0 and 136.5-136.875 MHz ranges.
  
−
118.000 - 121.400 Air Traffic Control
+
==VHF Allocation - 118-137 MHz==
−
121.425 - 121.475 Band Protection for 121.5
+
{| class="wikitable sortable"
−
121.500         Emergency Search and Rescue (VHF Guard) (ELT Operational Check, 5 Sec)
+
|-
−
121.525 - 121.575 Band Protection for 121.5
+
! Lower Frequency !! Upper Frequency !! Allocation
−
121.600 - 121.925 Airport Utility and ELT Test
+
|-
−
121.950         Aviation Instructional and Support
+
| 118.000 || 121.400 || ATC
−
121.975         FSS Private Aircraft Advisory
+
|-
−
122.000 - 122.050 En Route Flight Advisory Service (EFAS)
+
| 121.425 || 121.450 || Gov AWOS/ASOS
−
122.075 - 122.675 FSS Private Aircraft Advisory
+
|-
−
122.700 - 122.725 Unicom - Uncontrolled Airports / Aeronautical Utility
+
| 121.475 || || Band Protection for 121.500
−
122.750         Private fixed wing aircraft air-to-air communications
+
|-
−
122.775         Aviational Instruction and Support
+
| 121.500 || || Emergency Frequency (Guard)
−
122.800         Unicom - Uncontrolled Airports / Aeronautical Utility
+
|-
−
122.825         Domestic VHF
+
| 121.525 || || Band Protection for 121.500
−
122.850         Multicom - Special Use and Aviation Support on Non Interference
+
|-
−
122.875         Domestic VHF
+
| 121.550 || 121.575 || Gov AWOS/ASOS
−
122.900         Unicom - Uncontrolled Airports / Multicom
+
|-
−
122.925         Unicom - Uncontrolled Airports / Multicom - Natural Resources
+
| 121.600 || 121.925 || ATC (Old Ground Control Frequency Band)
−
122.950         Unicom - Airport with full time ATCT or full time FSS
+
|-
−
122.975 - 123.000 Unicom - Uncontrolled Airports
+
| 121.775 || || SAR ELT Location Training
−
123.025         Helicopter Air-to-Air
+
|-
−
123.050 - 123.075 Unicom - Uncontrolled Airports
+
| 121.950 || || Aviation Support
−
123.100         Aeronautical Search and Rescue, also Temporary Control Tower on
+
|-
−
123.125 - 123.275 Flight Test Stations
+
| 121.975 || || FSS Private Aircraft Advisory
−
123.300         Aviation Support
+
|-
−
123.325 - 123.475 Flight Test Stations
+
| 122.000 || 122.050 || EFAS (Callsign "Flightwatch" terminated 10/1/2015 and merged with FSS)
−
123.450         Air to Air (Unofficial)
+
|-
−
123.500         Aviation Support
+
| 122.075 || 122.675 || FSS Private Aircraft Advisory
−
123.525 - 123.575 Flight Test Stations
+
|-
−
123.600 - 123.650 FSS Air Carrier Advisory
+
| 122.700 || 122.725 || UNICOM - Uncontrolled Airports
−
123.675 - 128.800 Air Traffic Control
+
|-
−
126.200         Air Traffic Control (Military Common)
+
| 122.750 || || Fixed Wing Aircraft - Air to Air
−
128.825 - 132.000 Domestic VHF (Operational Control)
+
|-
−
132.025 - 135.825 Air Traffic Control
+
| 122.775 || || Aviation Support
−
134.100         Air Traffic Control (Military Common)
+
|-
−
135.850         FAA Flight Inspection
+
| 122.800 || || UNICOM - Uncontrolled Airports
−
135.875 - 135.925 Air Traffic Control
+
|-
−
135.950         FAA Flight Inspection
+
| 122.825 || || Domestic VHF
−
135.975 - 136.400 Air Traffic Control
+
|-
−
136.425 - 136.475 Flight Information Services Data Link (FISDL)
+
| 122.850 || || MULTICOM
−
136.500 - 136.875 Domestic VHF
+
|-
−
136.900 - 139.975 International and Domestic VHF
+
| 122.875 || || UNICOM - Domestic VHF
 +
|-
 +
| 122.900 || || MULTICOM - SAR Training
 +
|-
 +
| 122.925 || || MULTICOM - Special Use/ National Response Management
 +
|-
 +
| 122.950 || || UNICOM - Full Time ATCT, FSS
 +
|-
 +
| 122.975 || 123.000 || UNICOM - Uncontrolled Airports
 +
|-
 +
| 123.025 || || Helicopter Air-to-Air
 +
|-
 +
| 123.025 || 123.075 || UNICOM - Uncontrolled Airports
 +
|-
 +
| 123.100 || || SAR; Temp. ATCTs and Fly-ins with SAR Coordination
 +
|-
 +
| 123.125 || 123.275 || Flight Test
 +
|-
 +
| 123.300 || || Aviation Support
 +
|-
 +
| 123.325 || 123.475 || Flight Test (123.450 Used for Air-to-Air Communications Over Remote and Oceanic Areas Out of Range of VHF Ground Stations)
 +
|-
 +
| 123.500 || || Aviation Support
 +
|-
 +
| 123.525 || 123.575 || Flight Test
 +
|-
 +
| 123.600 || 123.650 || ATC (Formerly Air Carrier Advisory. FSS Uses Phased Out)
 +
|-
 +
| 123.675 || 126.175 || ATC
 +
|-
 +
| 126.200 || || Military Common (Advisory)
 +
|-
 +
| 126.225 || 128.800 || ATC
 +
|-
 +
| 128.825 || 132.000 || Operational Control. Coordinated by ARINC (See [[#Airline Operations|Airline Operations]] Below)
 +
|-
 +
| 132.025 || 134.075 || ATC
 +
|-
 +
| 134.100 || || Military Common (Advisory)
 +
|-
 +
| 134.125 || 135.825 || ATC
 +
|-
 +
| 135.850 || || FAA Flight Inspection
 +
|-
 +
| 135.875 || 135.925 || ATC
 +
|-
 +
| 135.950 || || FAA Flight Inspection
 +
|-
 +
| 135.975 || 136.400 || ATC
 +
|-
 +
| 136.425 || 136.475 || Old FIS. (Now Unallocated)
 +
|-
 +
| 136.500 || 136.875 || Domestic VHF
 +
|-
 +
| 136.900 || 136.975 || International and Domestic VHF
 +
|}
 +
[https://www.faa.gov/documentLibrary/media/Order/6050_32B_WITH_CHG_1_AND_2_INCORPORATED.pdf FAA Order 6050.32B Change 1 Appendix 2 Figure 1.]
 +
<br>
 +
 
 +
== Common Civilian Frequencies ==
 +
<freqsubcat>64549</freqsubcat>
  
−
== Common UHF Frequencies ==
+
== Common Military Frequencies ==
−
  243.0    Aircraft Emergency/Distress Channel (UHF Guard)
+
In recent years many PMSV stations have moved off of the four older nationwide common frequencies.
−
  257.8    Air Traffic Control (Military Common)
+
  243.0000  Aircraft Emergency and Distress (Military Guard)
−
  282.8    Search & Rescue
+
  257.8000  Air Traffic Control (Military Common)
−
  255.4    FAA Flight Service Stations
+
  282.8000  Search and Rescue
−
  296.7    FAA Flight Service Stations
+
  255.4000  FAA Flight Service Stations
−
  239.8    PMSV (Pilot to Metro Service - weather advisory)
+
  296.7000  FAA Flight Service Stations
−
  342.5    PMSV
+
  239.8000  PMSV (Pilot to Metro Service - weather advisory)
−
  344.6    PMSV
+
  342.5000  PMSV
−
  375.2    PMSV
+
  344.6000  PMSV
−
  303.0    Air-to-air "Winchester"
+
  375.2000  PMSV
−
  311.0    USAF ACC Command Posts Pimary
+
  303.0000  Air-to-air "Winchester"
−
  321.0    USAF ACC Command Posts Secondary
+
  311.0000  USAF ACC Command Posts Pimary
−
  381.3    USAF ACC Command Posts
+
  321.0000  USAF ACC Command Posts Secondary
−
  319.4    USAF AMC Command Posts   
+
  381.3000  USAF ACC Command Posts
−
  349.4    USAF AMC Command Posts
+
  319.4000  USAF AMC Command Posts   
−
  252.1    USAF Reserve Command Posts
+
  349.4000  USAF AMC Command Posts
−
  351.2    USAF Reserve Command Posts
+
  252.1000  USAF Reserve Command Posts
−
  364.2    USAF NORAD AICC Primary
+
  351.2000  USAF Reserve Command Posts
−
  380.0    FAA Flight Inspection/ SMO Ground Personnel
+
  364.2000  USAF NORAD AICC Primary
−
  380.1    FAA Flight Inspection/ SMO Ground Personnel
+
  380.0000  FAA Flight Inspection/ SMO Ground Personnel
 +
  380.1000  FAA Flight Inspection/ SMO Ground Personnel
 
<br>
 
<br>
  
 
== ARINC En Route Service ==
 
== ARINC En Route Service ==
−
The ARINC En Route Service is available to aircraft above 20,000 feet and on the ground at select airports. Base is "San Francisco Radio" except on Gulf Net, Maritime Net and Mex Net which are "New York Radio."
+
ARINC operates a wide area radio network, primarily to enable airline customers to create voice patches. It is available above 20,000 feet and on the ground at select airports. Use examples include pilot to dispatch, maintenance control, or medical advisors. This is usually used to supplement ACARS or in lieu of ACARS if it is inoperative on an aircraft. This way airline dispatchers can maintain operational control of their aircraft in flight. Delta Air Lines maintains a similar but separate network called "Atlanta Radio".  
−
* [http://www.arinc.com/products/voice_data_comm/air_ground_radio_svc/jepp_charts.html ARINC En Route Service Coverage Maps]
 
−
* [http://www.arinc.com/products/voice_data_comm/index.html ARINC Voice and Data Communications]
 
  
−
128.9    Southwest USA
+
In the contiguous US, the base station callsign is "San Francisco Radio" except on Gulf Net, Maritime Net and Mex Net which are "New York Radio."
−
129.4    Northeast and Great Lakes USA / Canada West Coast and Anchorage
+
* [https://radio.arinc.net/ ARINC Voice Service] (this page has current HF/VHF coverage maps)
−
129.45  Central East Coast USA / Iowa and Surrounding Area USA
+
* [[ARINC Frequencies in the NE US]]
−
129.85  Northwest USA
 
−
129.9    Maritime Net (Northeast Coast USA)
 
−
130.2    Tennessee and Surrounding Area USA / Colorado and Utah USA
 
−
130.4    Rocky Mountains (North) USA
 
−
130.7    Gulf Net (Caribbean) / Mex Net (Mexico)
 
−
130.8    Southern California USA
 
−
131.175  Southeast USA
 
−
131.3    West Central USA
 
−
131.65  South Central USA
 
−
131.8    North Central USA
 
−
131.95  Pacific Net (West Coast USA and Hawaii)
 
  
 +
VHF en route frequencies changed effective 04 Apr 2012:
 +
128.9000  Southwest USA
 +
129.4000  Northeast USA / Great Lakes Area / Canada West Coast and Anchorage
 +
129.4500  East Central USA
 +
131.8000  Northwest USA
 +
129.9000  Maritime Net (Northeast Coast USA)
 +
130.7000  Mexico / Caribbean
 +
131.1750  Southeast USA
 +
130.4000  West Central USA
 +
131.9500  Pacific Net (West Coast USA and Hawaii)
 +
<br>
  
 
== Aircraft Communications Addressing and Reporting System ([[ACARS]]) ==
 
== Aircraft Communications Addressing and Reporting System ([[ACARS]]) ==
 
[[ACARS]] data is used to send messages to and from commercial airlines' aircraft.
 
[[ACARS]] data is used to send messages to and from commercial airlines' aircraft.
  
−
  129.125 United States
+
<freqsubcat>64548</freqsubcat>
−
  130.025 United States
+
 
−
131.125  United States (High Traffic Areas)  
+
<br>
−
131.55  United States
+
 
−
130.450  United States (High Traffic Areas)
+
== Balloon Operations ==
−
136.8    United States
+
  123.3000 Common air-to-ground (pilot-to-chase crew), shared with glider ops.
−
136.85  United States
+
  123.5000 Common air-to-ground (pilot-to-chase crew), shared with glider ops.
 +
  122.7500 Common air-to-air
 +
  122.0000 AFSS Weather requests
 +
 
 +
<br>
 +
 
 +
==Airline Operations==
 +
The frequencies between 128.825-132.000 and 136.500-136.975 MHz are managed and coordinated by Aviation Spectrum Resources, Inc (ASRI). ASRI was spun off from Aeronautical Radio, INC (ARINC) in 2010. ARINC is now owned by Collins Aerospace and ASRI is owned by a consortium of U.S. airlines. Operations such as pilot to FBO, pilot to airline ground operation station, pilot to dispatch via a radio network such as San Francisco Radio, and deice trucks are found almost exclusively between 128.825-132.000. Coordinating and FCC licensing is handled by ASRI. The licensee in FCC licenses is almost always ASRI, thus obfuscating the license's user. <sup>[https://www.asri.aero/about-us/ Source]</sup>
 +
 
 +
At large airports (DFW, DEN, DTW, ORD, LAX, among many others), the ramps are controlled by the airlines, not the FAA air traffic control. The ramp controllers provide permission for aircraft to enter and park at their gates, push back from the gate and start, and maintain the flow of traffic in their alleyways. Most ramp frequencies are found in the 128.825-132.000 range. These ramp frequencies are seldom published by the FAA.
 +
 
 +
Airline deice trucks at small and midsized stations often use the corresponding operations frequency. At hub airports, deice trucks often (not always) have dedicated frequencies; these dedicated frequencies often do not have a corresponding FCC license because its mobile to mobile and coordinated by ASRI.
 +
 
 +
==Conventions for Abbreviating Frequencies==
 +
In the VHF band, frequency designations read over the radio are often abbreviated. Sometimes for brevity, sometimes as another way to read back a frequency assignment to make sure it was received correctly, and occasionally out of laziness. The following conventions have varying degrees of acceptance in the US.
 +
* Ground frequencies: previously ground frequencies were assigned frequencies beginning in 121. So in reading back ground frequencies, the "121" may be assumed. So if the ground frequency is 121.600, it may be shorted to ".6" ("point six").
 +
* Omitting the last digit in a frequency ending in 5: because ATC frequencies are spaced at 0.025&nbsp;MHz (example, 132.000, 132.025, 132.050, 132.075) when the third decimal place is a 5 it may be omitted. So if the assigned frequency is 132.225, it may be read back as "132.22" ("one-three-two point two-two). This is perfectly acceptable by all controllers and users, many aircraft radios even omit the third decimal point.
 +
* Omitting the leading one: since VHF ATC frequencies begin with a 1, the 1 may be assumed. Not proper but still common. 123.050 can be shorted to "23.05" ("two-three point zero-five").
 +
* Middle four digits: combining the last two conventions and sometimes omitting the "point". 118.675 may be shorted to "1867" ("one-eight-six-seven" or "eighteen-sixty seven").
 +
 
 +
==See Also==
 +
* [[ARINC Frequencies in the NE US]]
 +
* [[ARTCC|Air Route Traffic Control Center]]
 +
* [[Blimps]]
 +
* [[Federal Aviation Administration]]
 +
* [[Finding Air Traffic Frequencies]]
 +
* [[Heavy Lift Helicopters]]
 +
* [[HF]]
 +
** [[MWARA]] - Major World Air Route Areas support HF Radio communications to aircraft outside of VHF range.
 +
** [[VOLMET]] - Oceanic Weather
 +
* [[Instrument Landing System (ILS) Frequencies |Navigation Aids]] including ILS, DME, VOR, TACAN, Marker Beacons, and NDB
 +
* [[Safety of Flight]]
  
 +
==External Links==
 +
===Federal Aviation Administration===
 +
* [https://www.faa.gov Federal Aviation Administration Home Page]
 +
* [https://www.faa.gov/air_traffic/flight_info/aeronav/Aero_Data/ Aeronautical Data] - Download the 28 Day NASR Subscription Data and other data.
 +
* [https://ais-faa.opendata.arcgis.com Aeronautical Information Services] - View and download maps of Class Airspace, ARTCC Boundary, etc.
 +
* [https://www.faa.gov/air_traffic/publications Air Traffic Plans and Publications] - Download the Aeronautical Information Manual and Pilot/Controller Glossary.
 +
* [https://www.faa.gov/airports/runway_safety/diagrams/ Airport Diagrams] - Search for and download airport diagrams.
 +
* [https://www.faa.gov/air_traffic/flight_info/aeronav/digital_products/ Digital Products] - Download various charts and supplements.
 +
* [https://www.1800wxbrief.com Flight Service]
 +
* [https://www.faa.gov/regulations_policies/handbooks_manuals Handbooks and Manuals]
 +
* [https://registry.faa.gov/aircraftinquiry/NNum_Inquiry.aspx N-Number Inquiry] - Look up aircraft registration numbers.
 +
* [https://pilotweb.nas.faa.gov/PilotWeb PilotWeb] - Search for NOTAMS.
 +
* [https://sua.faa.gov Special Use Airspace (SUA)]
 +
* [https://tfr.faa.gov Temporary Flight Restrictions (TFR)]
  
−
== Federal Aviation Administration ==
+
===Aeronautical Data and Aircraft Tracking===
−
[[Federal Aviation Administration]]
+
;USA
 +
* [https://www.airnav.com AirNav.com] - Online airport and navaid info.
 +
* [https://flightaware.com FlightAware] - Real time flight tracking
 +
* [https://flightradar24.com FlightRadar24] - Real time flight tracking
 +
* [https://liveatc.net LiveATC.net] - Live air traffic control radio feeds
 +
* [https://planefinder.net planefinder.net] - Real time flight tracking (ADS-B) + 5 min delay (FAA Data)
 +
* [https://skyvector.com SkyVector.com] - Online aeronautical charts.
 +
* [https://vfrmap.com VFRMAP.com] - Online aeronautical charts.
 +
;Canada
 +
* [https://web.archive.org/web/20190714201918/http://www.canairradio.com:80/ Canadian Aeronautical Communications (Archive)] - Unmaintained since 2019 (<i>Live URL has been taken over by malicious actor</i>).
  
−
== Air Route Traffic Control Centers (ARTCC) ==
 
−
Each Center is indexed at the [[ARTCC]] article.
 
  
−
== Finding Air Traffic Frequencies ==
+
===Other Links===
−
[[Finding Air Traffic Frequencies]]
+
* [http://mt-fedfiles.blogspot.com/p/blog-page.html The Fed Files] Nationwide Military Frequencies
  
−
== Related Links ==
+
== Files ==
−
* [http://skyvector.com SkyVector.com] - Online aeronautical charts.
+
* [[media:ASRI_VHF_2022.zip|ASRI_VHF_2022.zip]] - Contains a Google Earth .kml map of ASRI VHF (128.825-136.975) ground stations.
−
* [http://mt-milcom.blogspot.com Milcom Monitoring Post] has a lot of good military aviation frequency info.
+
* [[media:FAA.zip|FAA.zip]] - Contains a Google Earth .kml map of ARTCCs, ARTCC boundaries, ARTCC RCAG sites, Partial list of ARTCC radar sites, AFSS Hubs, AFSS RCO sites, and Navaids.
  
 
== References ==
 
== References ==
−
* [http://edocket.access.gpo.gov/cfr_2008/octqtr/47cfr87.173.htm 47CFR87.173 Aeronautical Frequency Table]
+
* [https://www.ecfr.gov/current/title-47/chapter-I/subchapter-D/part-87/subpart-E 47 CFR 87.173 Frequencies]
−
* [http://wireless.fcc.gov/aviation/ FCC Aviation Radio Service]
+
* [http://wireless.fcc.gov/services/index.htm?job=service_home&id=aviation FCC Aviation Radio Service]
 
* [http://www.faa.gov/documentLibrary/media/Order/6050_12A.pdf Southwest Region Spectrum Management Handbook] SW 6050.12A December 12, 2001
 
* [http://www.faa.gov/documentLibrary/media/Order/6050_12A.pdf Southwest Region Spectrum Management Handbook] SW 6050.12A December 12, 2001
 
* [http://www.faa.gov/documentLibrary/media/Order/6050_32B_WITH_CHG_1_AND_2_INCORPORATED.pdf Spectrum Management Regulations and Procedures Manual] JO 6050.32B November 17, 2005
 
* [http://www.faa.gov/documentLibrary/media/Order/6050_32B_WITH_CHG_1_AND_2_INCORPORATED.pdf Spectrum Management Regulations and Procedures Manual] JO 6050.32B November 17, 2005
 
<br>
 
<br>
  
−
[[Category:Aircraft Monitoring]]
+
 
−
[[Category:US and Canadian Common Frequencies]]
+
{{Refreshpage}}
 +
 
 +
Return to Wiki page: [[Common Frequencies]]
 +
 
 +
[[Category:US and Canadian Common Aviation Frequencies]]
 +
[[Category:Canada Civil Aviation]]
 +
[[Category:United States Civil Aviation]]
 +
[[Category:United States Civil Aviation Frequencies]]
 +
[[Category:United States Fire Services Aviation]]
 +
[[Category:United States Fire Services Aviation Frequencies]]
 +
[[Category:United States Law Enforcement Aviation]]
 +
[[Category:United States Law Enforcement Aviation Frequencies]]
 +
[[Category:United States Medical Aviation]]
 +
[[Category:United States Medical Aviation Frequencies]]
 +
[[Category:United States Military Aviation]]
 +
[[Category:United States Military Aviation Frequencies]]

Latest revision as of 14:58, 5 January 2023

Aircraft use Airband as their primary means of voice communication. In North America, the spectrum from 118.000 to 136.975 MHz is used with 25 kHz spacing and AM. As of 2010 aeronautical enroute and flight test stations may use 8.33 kHz spaced channels in the 121.4-123.6, 128.825-132.0 and 136.5-136.875 MHz ranges.

VHF Allocation - 118-137 MHz

Lower Frequency Upper Frequency Allocation
118.000 121.400 ATC
121.425 121.450 Gov AWOS/ASOS
121.475 Band Protection for 121.500
121.500 Emergency Frequency (Guard)
121.525 Band Protection for 121.500
121.550 121.575 Gov AWOS/ASOS
121.600 121.925 ATC (Old Ground Control Frequency Band)
121.775 SAR ELT Location Training
121.950 Aviation Support
121.975 FSS Private Aircraft Advisory
122.000 122.050 EFAS (Callsign "Flightwatch" terminated 10/1/2015 and merged with FSS)
122.075 122.675 FSS Private Aircraft Advisory
122.700 122.725 UNICOM - Uncontrolled Airports
122.750 Fixed Wing Aircraft - Air to Air
122.775 Aviation Support
122.800 UNICOM - Uncontrolled Airports
122.825 Domestic VHF
122.850 MULTICOM
122.875 UNICOM - Domestic VHF
122.900 MULTICOM - SAR Training
122.925 MULTICOM - Special Use/ National Response Management
122.950 UNICOM - Full Time ATCT, FSS
122.975 123.000 UNICOM - Uncontrolled Airports
123.025 Helicopter Air-to-Air
123.025 123.075 UNICOM - Uncontrolled Airports
123.100 SAR; Temp. ATCTs and Fly-ins with SAR Coordination
123.125 123.275 Flight Test
123.300 Aviation Support
123.325 123.475 Flight Test (123.450 Used for Air-to-Air Communications Over Remote and Oceanic Areas Out of Range of VHF Ground Stations)
123.500 Aviation Support
123.525 123.575 Flight Test
123.600 123.650 ATC (Formerly Air Carrier Advisory. FSS Uses Phased Out)
123.675 126.175 ATC
126.200 Military Common (Advisory)
126.225 128.800 ATC
128.825 132.000 Operational Control. Coordinated by ARINC (See Airline Operations Below)
132.025 134.075 ATC
134.100 Military Common (Advisory)
134.125 135.825 ATC
135.850 FAA Flight Inspection
135.875 135.925 ATC
135.950 FAA Flight Inspection
135.975 136.400 ATC
136.425 136.475 Old FIS. (Now Unallocated)
136.500 136.875 Domestic VHF
136.900 136.975 International and Domestic VHF

FAA Order 6050.32B Change 1 Appendix 2 Figure 1.

Common Civilian Frequencies

Frequency  Type  Tone  Alpha Tag  Description  Mode  Tag 
121.50000  M  CSQ  VHF Guard Aircraft Emergency and Distress (VHF Guard)  AM  Aircraft 
121.95000  M  CSQ  AvSup 121.95 Aviation Support  AM  Business 
122.75000  M  CSQ  Air-Air 122.750 Aircraft air-to-air  AM  Aircraft 
122.77500  M  CSQ  AvSup 122.775 Aviation Support  AM  Business 
122.85000  M  CSQ  Multi 122.85 Multicom, Aviation Support  AM  Aircraft 
122.90000  M  CSQ  Multi 122.9 Multicom, Search and Rescue Training  AM  Aircraft 
122.92500  M  CSQ  Multi 122.925 Multicom - Special Use, Natural resource management  AM  Aircraft 
123.02500  M  CSQ  Helo Air-Air Helicopter Air-to-Air  AM  Aircraft 
123.10000  M  CSQ  SAR Primary Search and Rescue primary, ATC for special events secondary  AM  Aircraft 
123.12500  M  CSQ  FlightTest123.12 Flight Test itinerant  AM  Business 
123.15000  M  CSQ  FlightTest123.15 Flight Test itinerant  AM  Business 
123.17500  M  CSQ  FlightTest123.17 Flight Test itinerant  AM  Business 
123.20000  M  CSQ  FlightTest123.2 Flight Test  AM  Business 
123.22500  M  CSQ  FlightTest123.22 Flight Test  AM  Business 
123.25000  M  CSQ  FlightTest123.25 Flight Test  AM  Business 
123.27500  M  CSQ  FlightTest123.27 Flight Test  AM  Business 
123.30000  M  CSQ  AvSup 123.3 Aviation Support  AM  Business 
123.32500  M  CSQ  FlightTest123.32 Flight Test  AM  Business 
123.35000  M  CSQ  FlightTest123.35 Flight Test  AM  Business 
123.37500  M  CSQ  FlightTest123.37 Flight Test  AM  Business 
123.40000  M  CSQ  FlightTest123.4 Flight Test itinerant  AM  Business 
123.42500  M  CSQ  FlightTest123.42 Flight Test itinerant  AM  Business 
123.45000  M  CSQ  FlightTest123.45 Flight Test/Unofficial Air-to-Air  AM  Business 
123.47500  M  CSQ  FlightTest123.47 Flight Test  AM  Business 
123.50000  M  CSQ  AvSup 123.5 Aviation Support  AM  Business 
123.52500  M  CSQ  FlightTest123.52 Flight Test  AM  Business 
123.55000  M  CSQ  FlightTest123.55 Flight Test  AM  Business 
123.57500  M  CSQ  FlightTest123.57 Flight Test  AM  Business 
126.20000  M  CSQ  MilCom 126.2 Military Common (advisory)  AM  Aircraft 
134.10000  M  CSQ  MilCom 134.1 Military Common (advisory)  AM  Aircraft 
135.85000  M  CSQ  FltIns135.85 FAA Flight Inspection  AM  Federal 
135.95000  M  CSQ  FltIns135.95 FAA Flight Inspection  AM  Federal 
122.20000  M  CSQ  Flt Watch Wx Flight Watch Weather  AM  Aircraft 
129.52500  M  CSQ  Deicing Comm Deicing Common  AM  Business 
121.77500  M  CSQ  ELT Training Emergency Locator Transmitter (ELT) Training Beacons  AM  Aircraft 
122.70000  M  CSQ  FAA 122.700 Unicom  AM  Aircraft 
122.72500  M  CSQ  FAA 122.725 Unicom  AM  Aircraft 
122.80000  M  CSQ  FAA 122.8 Unicom  AM  Aircraft 
122.97500  M  CSQ  FAA 122.975 Unicom  AM  Aircraft 
123.00000  M  CSQ  FAA 123.000 Unicom  AM  Aircraft 
123.05000  M  CSQ  FAA 123.05 Unicom  AM  Aircraft 
123.07500  M  CSQ  FAA 123.075 Unicom  AM  Aircraft 
122.95000  BM  CSQ  Unicom 122.95 Unicom - Controlled Airports  AM  Aircraft 


Common Military Frequencies

In recent years many PMSV stations have moved off of the four older nationwide common frequencies. 

243.0000  Aircraft Emergency and Distress (Military Guard)
257.8000  Air Traffic Control (Military Common)
282.8000  Search and Rescue
255.4000  FAA Flight Service Stations
296.7000  FAA Flight Service Stations
239.8000  PMSV (Pilot to Metro Service - weather advisory)
342.5000  PMSV
344.6000  PMSV
375.2000  PMSV
303.0000  Air-to-air "Winchester"
311.0000  USAF ACC Command Posts Pimary
321.0000  USAF ACC Command Posts Secondary
381.3000  USAF ACC Command Posts
319.4000  USAF AMC Command Posts  
349.4000  USAF AMC Command Posts
252.1000  USAF Reserve Command Posts
351.2000  USAF Reserve Command Posts
364.2000  USAF NORAD AICC Primary
380.0000  FAA Flight Inspection/ SMO Ground Personnel
380.1000  FAA Flight Inspection/ SMO Ground Personnel


ARINC En Route Service

ARINC operates a wide area radio network, primarily to enable airline customers to create voice patches. It is available above 20,000 feet and on the ground at select airports. Use examples include pilot to dispatch, maintenance control, or medical advisors. This is usually used to supplement ACARS or in lieu of ACARS if it is inoperative on an aircraft. This way airline dispatchers can maintain operational control of their aircraft in flight. Delta Air Lines maintains a similar but separate network called "Atlanta Radio".

In the contiguous US, the base station callsign is "San Francisco Radio" except on Gulf Net, Maritime Net and Mex Net which are "New York Radio."

VHF en route frequencies changed effective 04 Apr 2012: 

128.9000  Southwest USA
129.4000  Northeast USA / Great Lakes Area / Canada West Coast and Anchorage
129.4500  East Central USA
131.8000  Northwest USA
129.9000  Maritime Net (Northeast Coast USA)
130.7000  Mexico / Caribbean
131.1750  Southeast USA
130.4000  West Central USA
131.9500  Pacific Net (West Coast USA and Hawaii)


Aircraft Communications Addressing and Reporting System (ACARS)

ACARS data is used to send messages to and from commercial airlines' aircraft.

Frequency  Type  Alpha Tag  Description  Mode  Tag 
131.72500  BM  ACARS SITA Base Base Frequency  Telm  Data 
129.35000  BM  SITA 129.35 En Route  Telm  Data 
130.87500  BM  SITA 130.875 Terminal  Telm  Data 
131.65000  BM  SITA 131.650 Terminal  Telm  Data 
128.97500  BM  SITA 128.975 Terminal - Spare  Telm  Data 
131.00000  BM  SITA 131.000 Terminal - Spare  Telm  Data 
131.47500  BM  SITA 131.475 DataPlus (Air Canada) En Route  Telm  Data 



Balloon Operations

123.3000 Common air-to-ground (pilot-to-chase crew), shared with glider ops.
123.5000 Common air-to-ground (pilot-to-chase crew), shared with glider ops.
122.7500 Common air-to-air
122.0000 AFSS Weather requests


Airline Operations

The frequencies between 128.825-132.000 and 136.500-136.975 MHz are managed and coordinated by Aviation Spectrum Resources, Inc (ASRI). ASRI was spun off from Aeronautical Radio, INC (ARINC) in 2010. ARINC is now owned by Collins Aerospace and ASRI is owned by a consortium of U.S. airlines. Operations such as pilot to FBO, pilot to airline ground operation station, pilot to dispatch via a radio network such as San Francisco Radio, and deice trucks are found almost exclusively between 128.825-132.000. Coordinating and FCC licensing is handled by ASRI. The licensee in FCC licenses is almost always ASRI, thus obfuscating the license's user. Source

At large airports (DFW, DEN, DTW, ORD, LAX, among many others), the ramps are controlled by the airlines, not the FAA air traffic control. The ramp controllers provide permission for aircraft to enter and park at their gates, push back from the gate and start, and maintain the flow of traffic in their alleyways. Most ramp frequencies are found in the 128.825-132.000 range. These ramp frequencies are seldom published by the FAA.

Airline deice trucks at small and midsized stations often use the corresponding operations frequency. At hub airports, deice trucks often (not always) have dedicated frequencies; these dedicated frequencies often do not have a corresponding FCC license because its mobile to mobile and coordinated by ASRI.

Conventions for Abbreviating Frequencies

In the VHF band, frequency designations read over the radio are often abbreviated. Sometimes for brevity, sometimes as another way to read back a frequency assignment to make sure it was received correctly, and occasionally out of laziness. The following conventions have varying degrees of acceptance in the US.

  • Ground frequencies: previously ground frequencies were assigned frequencies beginning in 121. So in reading back ground frequencies, the "121" may be assumed. So if the ground frequency is 121.600, it may be shorted to ".6" ("point six").
  • Omitting the last digit in a frequency ending in 5: because ATC frequencies are spaced at 0.025 MHz (example, 132.000, 132.025, 132.050, 132.075) when the third decimal place is a 5 it may be omitted. So if the assigned frequency is 132.225, it may be read back as "132.22" ("one-three-two point two-two). This is perfectly acceptable by all controllers and users, many aircraft radios even omit the third decimal point.
  • Omitting the leading one: since VHF ATC frequencies begin with a 1, the 1 may be assumed. Not proper but still common. 123.050 can be shorted to "23.05" ("two-three point zero-five").
  • Middle four digits: combining the last two conventions and sometimes omitting the "point". 118.675 may be shorted to "1867" ("one-eight-six-seven" or "eighteen-sixty seven").

See Also

External Links

Federal Aviation Administration

Aeronautical Data and Aircraft Tracking

USA
Canada


Other Links

Files

  • ASRI_VHF_2022.zip - Contains a Google Earth .kml map of ASRI VHF (128.825-136.975) ground stations.
  • FAA.zip - Contains a Google Earth .kml map of ARTCCs, ARTCC boundaries, ARTCC RCAG sites, Partial list of ARTCC radar sites, AFSS Hubs, AFSS RCO sites, and Navaids.

References



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