Aircraft

1 Common VHF Frequencies
2 Common UHF Frequencies
3 ARINC En Route Service
4 Aircraft Communications Addressing and Reporting System (ACARS)
5 Balloon Operations
6 Blimps
7 Heavy Lift Helicopters
8 Other Aircraft Frequencies
9 Federal Aviation Administration
10 Air Route Traffic Control Centers (ARTCC)
11 MWARA
12 Finding Air Traffic Frequencies
13 Related Links
- 13.1 USA
- 13.2 Canada
14 References

Common VHF Frequencies

In the US the civil aircraft communications band (118-137 MHz) generally uses 25 kHz spaced channels.

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.

Frequency	Type	Tone	Alpha Tag	Description	Mode	Tag
121.50000	BM		VHF Guard	Aircraft Emergency and Distress (VHF Guard)	AM	Aircraft
121.95000	BM		AvSup 121.95	Aviation Support	AM	Business
122.75000	M		FixedAir-Air	Fixed wing aircraft air-to-air	AM	Aircraft
122.77500	BM		AvSup122.775	Aviation Support	AM	Business
122.85000	BM		Multi 122.85	Multicom, Aviation Support	AM	Aircraft
122.90000	BM		Multi 122.9	Multicom, Search and Rescue Training	AM	Aircraft
122.92500	BM		Multi122.925	Multicom - Special Use, Natural resource management	AM	Aircraft
123.02500	M		Heli Air-Air	Helicopter Air-to-Air	AM	Aircraft
123.10000	BM		SAR Primary	Search and Rescue primary, ATC for special events secondary	AM	Fire-Tac
123.12500	BM		FltTst123.12	Flight Test itinerant	AM	Business
123.15000	BM		FltTst123.15	Flight Test itinerant	AM	Business
123.17500	BM		FltTst123.17	Flight Test itinerant	AM	Business
123.20000	BM		FltTest123.2	Flight Test	AM	Business
123.22500	BM		FltTst123.22	Flight Test	AM	Business
123.25000	BM		FltTst123.25	Flight Test	AM	Business
123.27500	BM		FltTst123.27	Flight Test	AM	Business
123.30000	BM		AvSup 123.3	Aviation Support	AM	Business
123.32500	BM		FltTst123.32	Flight Test	AM	Business
123.35000	BM		FltTst123.35	Flight Test	AM	Business
123.37500	BM		FltTst123.37	Flight Test	AM	Business
123.40000	BM		FltTest123.4	Flight Test itinerant	AM	Business
123.42500	BM		FltTst123.42	Flight Test itinerant	AM	Business
123.45000	BM		FltTst123.45	Flight Test/Unofficial Air-to-Air	AM	Business
123.47500	BM		FltTst123.47	Flight Test	AM	Business
123.50000	BM		AvSup 123.5	Aviation Support	AM	Business
123.52500	BM		FltTst123.52	Flight Test	AM	Business
123.55000	BM		FltTst123.55	Flight Test	AM	Business
123.57500	BM		FltTst123.57	Flight Test	AM	Business
126.20000	BM		MilCom 126.2	Military Common (advisory)	AM	Aircraft
134.10000	BM		MilCom 134.1	Military Common (advisory)	AM	Aircraft
135.85000	BM		FltIns135.85	FAA Flight Inspection	AM	Federal
135.95000	BM		FltIns135.95	FAA Flight Inspection	AM	Federal
122.00000	BM		FltWatchWx	Flight Watch Weather	AM	Aircraft
129.52500	M	CSQ	DeicingComm	Deicing Common	AM	Business
121.77500	M	CSQ	ELT Training	Emergency Locator Transmitter (ELT) Training Beacons	AM	Aircraft

From Appendix 2 of FAA Spectrum Management Regulations and Procedures Manual and 87.173 Aeronautical Frequency Table (See references below)

118.000 - 121.400  Air Traffic Control
121.425 - 121.450  Govt AWOS/ASOS
121.475 - 121.525  Band Protection for 121.5
121.550 - 121.575  Govt AWOS/ASOS
121.600 - 121.925  Air Traffic Control (Old gnd ctrl freq band)
121.775            SAR ELT Location training
121.975            FSS Private Aircraft Advisory
122.000 - 122.050  En Route Flight Advisory Service (EFAS)
122.075 - 122.675  FSS Private Aircraft Advisory
122.700 - 122.725  Unicom - Uncontrolled Airports
122.800            Unicom - Uncontrolled Airports
122.825            Domestic VHF
122.875            Unicom, Domestic VHF
122.950            Unicom - Airports with full time ATCT or FSS
122.975 - 123.000  Unicom - Uncontrolled Airports
123.050 - 123.075  Unicom - Uncontrolled Airports
123.125 - 123.175  Flight Test itinerant
123.200 - 123.275  Flight Test
123.325 - 123.375  Flight Test
123.425 - 123.475  Flight Test
123.525 - 123.575  Flight Test
123.600 - 126.800  Air Traffic Control
128.825 - 132.000  Operational Control
132.025 - 136.475  Air Traffic Control
136.500 - 136.875  Domestic VHF
136.900 - 136.975  International and Domestic VHF

Common UHF Frequencies

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

243.0  Aircraft Emergency and Distress (UHF Guard)
257.8  Air Traffic Control (Military Common)
282.8  Search and Rescue
255.4  FAA Flight Service Stations
296.7  FAA Flight Service Stations
239.8  PMSV (Pilot to Metro Service - weather advisory)
342.5  PMSV
344.6  PMSV
375.2  PMSV
303.0  Air-to-air "Winchester"
311.0  USAF ACC Command Posts Pimary
321.0  USAF ACC Command Posts Secondary
381.3  USAF ACC Command Posts
319.4  USAF AMC Command Posts  
349.4  USAF AMC Command Posts
252.1  USAF Reserve Command Posts
351.2  USAF Reserve Command Posts
364.2  USAF NORAD AICC Primary
380.0  FAA Flight Inspection/ SMO Ground Personnel
380.1  FAA Flight Inspection/ SMO Ground Personnel

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."

VHF en route frequencies changed effective 04 Apr 2012:

128.900  Southwest USA
129.400  Northeast USA / Canada West Coast and Anchorage
129.450  East Central USA
131.800  Northwest USA
129.900  Maritime Net (Northeast Coast USA)
130.700  Mexico / Carribean
131.175  Southeast USA
130.400  West Central USA
131.950  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
129.12500	BM	ACARS129.125	United States	Telm	Data
130.02500	BM	ACARS130.025	United States	Telm	Data
131.12500	BM	ACARS131.125	United States (High Traffic Areas)	Telm	Data
131.55000	BM	ACARS 131.55	United States	Telm	Data
130.45000	BM	ACARS 130.45	United States (High Traffic Areas)	Telm	Data
136.80000	BM	ACARS 136.8	United States	Telm	Data
136.85000	BM	ACARS 136.85	United States	Telm	Data
136.75000	BM	ACARS 136.75	United States	Telm	Data

Balloon Operations

123.3 Common air-to-ground (pilot-to-chase crew), shared with glider ops.
123.5 Common air-to-ground (pilot-to-chase crew), shared with glider ops.
122.75 Common air-to-air
122.0 AFSS Weather requests