Statutes, codes, and regulations
Code of Federal Regulations
Title 47 - TELECOMMUNICATIONChapter I - FEDERAL COMMUNICATIONS COMMISSIONSubchapter D - SAFETY AND SPECIAL RADIO SERVICESPart 87 - AVIATION SERVICES
Subpart Q - STATIONS IN THE RADIODETERMINATION SERVICE
Section 87.475 - Frequencies

47 C.F.R. § 87.475

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Current through October 31, 2024
Section 87.475 - Frequencies
(a)Frequency coordination. The Commission will assign frequencies to radionavigation land stations and radionavigation land test stations after coordination with the FAA. The applicant must notify the appropriate Regional Office of the FAA prior to submission to the Commission of an application for a new station or for modification of an existing station to change frequency, power, location or emission. Each application must include the FAA Regional Office notified and date of notification.
(b)Frequencies available for radionavigation land stations.
(1) LORAN-C is a long range navigation system which operates in the 90-110 kHz band.
(2) Radiobeacon stations enable an aircraft station to determine bearing or direction in relation to the radiobeacon station. Radiobeacons operate in the bands 190-285 kHz; 325-435 kHz; 510-525 kHz; and 525-535 kHz. Radiobeacons may be authorized, primarily for off-shore use, in the band 525-535 kHz on a non-interference basis to travelers information stations.
(3) Aeronautical marker beacon stations radiate a vertical distinctive pattern on 75 MHz which provides position information to aircraft.
(4) The following table lists the specific frequencies in the 108.100-111.950 MHz band which are assignable to localizer stations with simultaneous radiotelephone channels and their associated glide path station frequency from the 328.600-335.400 MHz band.

Localizer (MHz)Glide path (MHz)
108.100334.700
108.150334.550
108.300334.100
108.350333.950
108.500329.900
108.550329.750
108.700330.500
108.750330.350
108.900329.300
108.950329.150
109.100331.400
109.150331.250
109.300332.000
109.350331.850
109.500332.600
109.550332.450
109.700333.200
109.750333.050
109.900333.800
109.950333.650
110.100334.400
110.150334.250
110.300335.000
110.350334.850
110.500329.600
110.550329.450
110.700330.200
110.750330.050
110.900330.800
110.950330.650
111.100331.700
111.150331.550
111.300332.300
111.350332.150
111.500332.900
111.550332.750
111.700333.500
111.750333.350
111.900331.100
111.950330.950

(5) VHF omni-range (VOR) stations are to be assigned frequencies in the 112.050-117.950 MHz band (50 kHz channel spacing) and the following frequencies in the 108-112 MHz band:

108.200

108.250

108.400

108.450

108.600

108.650

108.800

108.850

109.000

109.050

109.200

109.250

109.400

109.450

109.600

109.650

109.800

109.850

110.000

110.050

110.200

110.250

110.400

110.450

110.600

110.650

110.800

110.850

111.000

111.050

111.200

111.250

111.400

111.450

111.600

111.650

111.800

111.850

112.000

(6) The band 960-1215 MHz is available for the use of land stations and associated airborne electronic aids to air navigation. When distance measuring equipment (DME) is intended to operate with a single VHF navigation station in the 108-117.975 MHz band, the DME operating channel must be paired with the VHF channel as shown in the following table:

DME Channeling and Pairing

[MHz]

VHF channel Airborne interrogating frequencyGround reply frequency
108.0001041.000978.000
108.0501041.0001104.000
108.1001042.000979.000
108.1501042.0001105.000
108.2001043.000980.000
108.2501043.0001106.000
108.3001044.000981.000
108.3501044.0001107.000
108.4001045.000982.000
108.4501045.0001108.000
108.5001046.000983.000
108.5501046.0001109.000
108.6001047.000984.000
108.6501047.0001110.000
108.7001048.000985.000
108.7501048.0001111.000
108.8001049.000986.000
108.8501049.0001112.000
108.9001050.000987.000
108.9501050.0001113.000
109.0001051.000988.000
109.0501051.0001114.000
109.1001052.000989.000
109.1501052.0001115.000
109.2001053.000990.000
109.2501053.0001116.000
109.3001054.000991.000
109.3501054.0001117.000
109.4001055.000992.000
109.4501055.0001118.000
109.5001056.000993.000
109.5501056.0001119.000
109.6001057.000994.000
109.6501057.0001120.000
109.7001058.000995.000
109.7501058.0001121.000
109.8001059.000996.000
109.8501059.0001122.000
109.9001060.000997.000
109.9501060.0001123.000
110.0001061.000998.000
110.0501061.0001124.000
110.1001062.000999.000
110.1501062.0001125.000
110.2001063.0001000.000
110.2501063.0001126.000
110.3001064.0001001.000
110.3501064.0001127.000
110.4001065.0001002.000
110.4501065.0001128.000
110.5001066.0001003.000
110.5501066.0001129.000
110.6001067.0001004.000
110.6501067.0001130.000
110.7001068.0001005.000
110.7501068.0001131.000
110.8001069.0001006.000
110.8501069.0001132.000
110.9001070.0001007.000
110.9501070.0001133.000
111.0001071.0001008.000
111.0501071.0001134.000
111.1001072.0001009.000
111.1501072.0001135.000
111.2001073.0001010.000
111.2501073.0001136.000
111.3001074.0001011.000
111.3501074.0001137.000
111.4001075.0001012.000
111.4501075.0001138.000
111.5001076.0001013.000
111.5501076.0001139.000
111.6001077.0001014.000
111.6501077.0001140.000
111.7001078.0001015.000
111.7501078.0001141.000
111.8001079.0001016.000
111.8501079.0001142.000
111.9001080.0001017.000
111.9501080.0001143.000
112.0001081.0001018.000
112.0501081.0001144.000
112.1001082.0001019.000
112.1501082.0001145.000
112.2001083.0001020.000
112.2501083.0001146.000
112.3001094.0001157.000
112.3501094.0001031.000
112.4001095.0001158.000
112.4501095.0001032.000
112.5001096.0001159.000
112.5501096.0001033.000
112.6001097.0001160.000
112.6501097.0001034.000
112.7001098.0001161.000
112.7501098.0001035.000
112.8001099.0001162.000
112.8501099.0001036.000
112.9001100.0001163.000
112.9501100.0001037.000
113.0001101.0001164.000
113.0501101.0001038.000
113.1001102.0001165.000
113.1501102.0001039.000
113.2001103.0001166.000
113.2501103.0001040.000
113.3001104.0001167.000
113.3501104.0001041.000
113.4001105.0001168.000
113.4501105.0001042.000
113.5001106.0001169.000
113.5501106.0001043.000
113.6001107.0001170.000
113.6501107.0001044.000
113.7001108.0001171.000
113.7501108.0001045.000
113.8001109.0001172.000
113.8501109.0001046.000
113.9001110.0001173.000
113.9501110.0001047.000
114.0001111.0001174.000
114.0501111.0001048.000
114.1001112.0001175.000
114.1501112.0001049.000
114.2001113.0001176.000
114.2501113.0001050.000
114.3001114.0001177.000
114.3501114.0001051.000
114.4001115.0001178.000
114.4501115.0001052.000
114.5001116.0001179.000
114.5501116.0001053.000
114.6001117.0001180.000
114.6501117.0001054.000
114.7001118.0001181.000
114.7501118.0001055.000
114.8001119.0001182.000
114.8501119.0001056.000
114.9001120.0001183.000
114.9501120.0001057.000
115.0001121.0001184.000
115.0501121.0001058.000
115.1001122.0001185.000
115.1501122.0001059.000
115.2001123.0001186.000
115.2501123.0001060.000
115.3001124.0001187.000
115.3501124.0001061.000
115.4001125.0001188.000
115.4501125.0001062.000
115.5001126.0001189.000
115.5501126.0001063.000
115.6001127.0001190.000
115.6501127.0001064.000
115.7001128.0001191.000
115.7501128.0001065.000
115.8001129.0001192.000
115.8501129.0001066.000
115.9001130.0001193.000
115.9501130.0001067.000
116.0001131.0001194.000
116.0501131.0001068.000
116.1001132.0001195.000
116.1501132.0001069.000
116.2001133.0001196.000
116.2501133.0001070.000
116.3001134.0001197.000
116.3501134.0001071.000
116.4001135.0001198.000
116.4501135.0001072.000
116.5001136.0001199.000
116.5501136.0001073.000
116.6001137.0001200.000
116.6501137.0001074.000
116.7001138.0001201.000
116.7501138.0001075.000
116.8001139.0001202.000
116.8501139.0001076.000
116.9001140.0001203.000
116.9501140.0001077.000
117.0001141.0001204.000
117.0501141.0001078.000
117.1001142.0001205.000
117.1501142.0001079.000
117.2001143.0001206.000
117.2501143.0001080.000
117.3001144.0001207.000
117.3501144.0001081.000
117.4001145.0001208.000
117.4501145.0001082.000
117.5001146.0001209.000
117.5501146.0001083.000
117.6001147.0001210.000
117.6501147.0001084.000
117.7001148.0001211.000
117.7501148.0001085.000
117.8001149.0001212.000
117.8501149.0001086.000
117.9001150.0001213.000
117.9501150.0001087.000

(7) 978.0 MHz is authorized for Universal Access Transceiver service.
(8) 1300-1350 MHz: The use of this band is restricted to surveillance radar stations and associated airborne transponders.
(9) 1559-1626.5 MHz: The use of this band is limited to airborne electronic aids to air navigation and any associated land stations.
(10) 2700-2900 MHz: Non-Government land-based radars may be licensed. U.S. Government coordination is required. Applicants must demonstrate a need for the service which the Government is not prepared to render.
(11) 5000-5250 MHz: This band is to be used for the operation of the international standard system (microwave landing system).
(12) 9000-9200 MHz: This band is available to land-based radars. Stations operating in this band may receive interference from stations operating in the radiolocation service.
(13) 15,400-15,700 MHz: This band is available for use of land stations associated with airborne electronic aids to air navigation.
(14) 24,250-25,250, 32,300-33,400 MHz: In these bands, land-based radionavigation aids are permitted where they operate with airborne radionavigation devices.
(c)Frequencies available for radionavigation land test stations.
(1) The frequencies set forth in §§ 87.187(c), (e) through (j), (r), (t), and (ff) ; and 87.475(b)(6) through (b)(11) may be assigned to radionavigation land test stations for the testing of aircraft transmitting equipment that normally operate on these frequencies and for the testing of land-based receiving equipment that operate with airborne radionavigation equipment.
(2) The frequencies available for assignment to radionavigation land test stations for the testing of airborne receiving equipment are 108.000 and 108.050 MHz for VHF omni-range; 108.100 and 108.150 MHz for localizer; 334.550 and 334.700 MHz for glide slope; 978 and 979 MHz (X channel)/1104 MHz (Y channel) for DME; 978 MHz for Universal Access Transceiver; 1030 MHz for air traffic control radar beacon transponders; 1090 MHz for Traffic Alert and Collision Avoidance Systems (TCAS); and 5031.0 MHz for microwave landing systems. Additionally, the frequencies in paragraph (b) of this section may be assigned to radionavigation land test stations after coordination with the FAA. The following conditions apply:after coordination with the FAA. The following conditions apply:
(i) The maximum power authorized on the frequencies 108.150 and 334.550 MHz is 1 milliwatt. The maximum power authorized on all other frequencies is one watt.
(ii) The pulse repetition rate (PRR) of the 1030 MHz ATC radar beacon test set will be 235 pulses per second (pps) ±5pps.
(iii) The assignment of 108.000 MHz is subject to the condition that no interference will be caused to the reception of FM broadcasting stations and stations using the frequency are not protected against interference from FM broadcasting stations.
(d)Frequencies available for ELT test stations. The frequencies available for assignment to ELT test stations are 121.600, 121.650, 121.700, 121.750, 121.800, 121.850, and 121.900 MHz. Licensees must:
(1) Not cause harmful interference to voice communications on these frequencies or any harmonically related frequency.
(2) Coordinate with the appropriate FAA Regional Spectrum Management Office prior to each activation of the transmitter.
(e)Frequencies available for differential GPS stations. Frequencies in the 112-118 MHz band may be assigned to Special Category I (SCAT-I) ground stations for differential GPS data links.
(1) The frequencies available are on 25 kHz centers with the lowest assignable frequency being centered at 112.000 MHz and the highest assignable frequency being centered at 117.950 MHz.
(2) Applicants must coordinate a frequency, time slot assignment, and three-letter identifier with the FAA and provide this information to the Commission upon application.

47 C.F.R. §87.475

53 FR 28940, Aug. 1, 1988, as amended at 54 FR 11721, Mar. 22, 1989; 63 FR 68958, Dec. 14, 1998; 64 FR 27476, May 20, 1999; 69 FR 32886 , June 14, 2004; 71 FR 70680 , Dec. 6, 2006; 78 FR 61207 , Oct. 3, 2013

At 80 FR 38911, July 7, 2015, §87.475 was amended by adding paragraphs (b)(11) and (14), however these paragraphs already exist and therefore, the new ones could not be incorporated. For the convenience of the user of the added text is set forth as follows

§87.475 Frequencies.

* * * * *

(b) * * *

(11) 5030-5150 MHz: This band is to be used for the operation of the international standard system (microwave landing system).

* * * * *

(14) 24,450-24,650 MHz and 32,300-33,400 MHz: In these bands, land-based radionavigation aids are permitted where they operate with airborne radionavigation devices.

* * * * *