{"data":{"id":"us/47-cfr-87.475","jurisdiction":"us","citation":"47 CFR 87.475","heading":"Frequencies.","body":"(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.\n(b) Frequencies available for radionavigation land stations. (1) LORAN-C is a long range navigation system which operates in the 90-110 kHz band.\n(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.\n(3) Aeronautical marker beacon stations radiate a vertical distinctive pattern on 75 MHz which provides position information to aircraft.\n(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.\nLocalizer (MHz) Glide path (MHz)\n108.100 334.700\n108.150 334.550\n108.300 334.100\n108.350 333.950\n108.500 329.900\n108.550 329.750\n108.700 330.500\n108.750 330.350\n108.900 329.300\n108.950 329.150\n109.100 331.400\n109.150 331.250\n109.300 332.000\n109.350 331.850\n109.500 332.600\n109.550 332.450\n109.700 333.200\n109.750 333.050\n109.900 333.800\n109.950 333.650\n110.100 334.400\n110.150 334.250\n110.300 335.000\n110.350 334.850\n110.500 329.600\n110.550 329.450\n110.700 330.200\n110.750 330.050\n110.900 330.800\n110.950 330.650\n111.100 331.700\n111.150 331.550\n111.300 332.300\n111.350 332.150\n111.500 332.900\n111.550 332.750\n111.700 333.500\n111.750 333.350\n111.900 331.100\n111.950 330.950\n(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:\n108.200\n108.250\n108.400\n108.450\n108.600\n108.650\n108.800\n108.850\n109.000\n109.050\n109.200\n109.250\n109.400\n109.450\n109.600\n109.650\n109.800\n109.850\n110.000\n110.050\n110.200\n110.250\n110.400\n110.450\n110.600\n110.650\n110.800\n110.850\n111.000\n111.050\n111.200\n111.250\n111.400\n111.450\n111.600\n111.650\n111.800\n111.850\n112.000\n(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:\nDME Channeling and Pairing\n[MHz]\nVHF channel Airborne interrogating frequency Ground reply frequency\n108.000 1041.000 978.000\n108.050 1041.000 1104.000\n108.100 1042.000 979.000\n108.150 1042.000 1105.000\n108.200 1043.000 980.000\n108.250 1043.000 1106.000\n108.300 1044.000 981.000\n108.350 1044.000 1107.000\n108.400 1045.000 982.000\n108.450 1045.000 1108.000\n108.500 1046.000 983.000\n108.550 1046.000 1109.000\n108.600 1047.000 984.000\n108.650 1047.000 1110.000\n108.700 1048.000 985.000\n108.750 1048.000 1111.000\n108.800 1049.000 986.000\n108.850 1049.000 1112.000\n108.900 1050.000 987.000\n108.950 1050.000 1113.000\n109.000 1051.000 988.000\n109.050 1051.000 1114.000\n109.100 1052.000 989.000\n109.150 1052.000 1115.000\n109.200 1053.000 990.000\n109.250 1053.000 1116.000\n109.300 1054.000 991.000\n109.350 1054.000 1117.000\n109.400 1055.000 992.000\n109.450 1055.000 1118.000\n109.500 1056.000 993.000\n109.550 1056.000 1119.000\n109.600 1057.000 994.000\n109.650 1057.000 1120.000\n109.700 1058.000 995.000\n109.750 1058.000 1121.000\n109.800 1059.000 996.000\n109.850 1059.000 1122.000\n109.900 1060.000 997.000\n109.950 1060.000 1123.000\n110.000 1061.000 998.000\n110.050 1061.000 1124.000\n110.100 1062.000 999.000\n110.150 1062.000 1125.000\n110.200 1063.000 1000.000\n110.250 1063.000 1126.000\n110.300 1064.000 1001.000\n110.350 1064.000 1127.000\n110.400 1065.000 1002.000\n110.450 1065.000 1128.000\n110.500 1066.000 1003.000\n110.550 1066.000 1129.000\n110.600 1067.000 1004.000\n110.650 1067.000 1130.000\n110.700 1068.000 1005.000\n110.750 1068.000 1131.000\n110.800 1069.000 1006.000\n110.850 1069.000 1132.000\n110.900 1070.000 1007.000\n110.950 1070.000 1133.000\n111.000 1071.000 1008.000\n111.050 1071.000 1134.000\n111.100 1072.000 1009.000\n111.150 1072.000 1135.000\n111.200 1073.000 1010.000\n111.250 1073.000 1136.000\n111.300 1074.000 1011.000\n111.350 1074.000 1137.000\n111.400 1075.000 1012.000\n111.450 1075.000 1138.000\n111.500 1076.000 1013.000\n111.550 1076.000 1139.000\n111.600 1077.000 1014.000\n111.650 1077.000 1140.000\n111.700 1078.000 1015.000\n111.750 1078.000 1141.000\n111.800 1079.000 1016.000\n111.850 1079.000 1142.000\n111.900 1080.000 1017.000\n111.950 1080.000 1143.000\n112.000 1081.000 1018.000\n112.050 1081.000 1144.000\n112.100 1082.000 1019.000\n112.150 1082.000 1145.000\n112.200 1083.000 1020.000\n112.250 1083.000 1146.000\n112.300 1094.000 1157.000\n112.350 1094.000 1031.000\n112.400 1095.000 1158.000\n112.450 1095.000 1032.000\n112.500 1096.000 1159.000\n112.550 1096.000 1033.000\n112.600 1097.000 1160.000\n112.650 1097.000 1034.000\n112.700 1098.000 1161.000\n112.750 1098.000 1035.000\n112.800 1099.000 1162.000\n112.850 1099.000 1036.000\n112.900 1100.000 1163.000\n112.950 1100.000 1037.000\n113.000 1101.000 1164.000\n113.050 1101.000 1038.000\n113.100 1102.000 1165.000\n113.150 1102.000 1039.000\n113.200 1103.000 1166.000\n113.250 1103.000 1040.000\n113.300 1104.000 1167.000\n113.350 1104.000 1041.000\n113.400 1105.000 1168.000\n113.450 1105.000 1042.000\n113.500 1106.000 1169.000\n113.550 1106.000 1043.000\n113.600 1107.000 1170.000\n113.650 1107.000 1044.000\n113.700 1108.000 1171.000\n113.750 1108.000 1045.000\n113.800 1109.000 1172.000\n113.850 1109.000 1046.000\n113.900 1110.000 1173.000\n113.950 1110.000 1047.000\n114.000 1111.000 1174.000\n114.050 1111.000 1048.000\n114.100 1112.000 1175.000\n114.150 1112.000 1049.000\n114.200 1113.000 1176.000\n114.250 1113.000 1050.000\n114.300 1114.000 1177.000\n114.350 1114.000 1051.000\n114.400 1115.000 1178.000\n114.450 1115.000 1052.000\n114.500 1116.000 1179.000\n114.550 1116.000 1053.000\n114.600 1117.000 1180.000\n114.650 1117.000 1054.000\n114.700 1118.000 1181.000\n114.750 1118.000 1055.000\n114.800 1119.000 1182.000\n114.850 1119.000 1056.000\n114.900 1120.000 1183.000\n114.950 1120.000 1057.000\n115.000 1121.000 1184.000\n115.050 1121.000 1058.000\n115.100 1122.000 1185.000\n115.150 1122.000 1059.000\n115.200 1123.000 1186.000\n115.250 1123.000 1060.000\n115.300 1124.000 1187.000\n115.350 1124.000 1061.000\n115.400 1125.000 1188.000\n115.450 1125.000 1062.000\n115.500 1126.000 1189.000\n115.550 1126.000 1063.000\n115.600 1127.000 1190.000\n115.650 1127.000 1064.000\n115.700 1128.000 1191.000\n115.750 1128.000 1065.000\n115.800 1129.000 1192.000\n115.850 1129.000 1066.000\n115.900 1130.000 1193.000\n115.950 1130.000 1067.000\n116.000 1131.000 1194.000\n116.050 1131.000 1068.000\n116.100 1132.000 1195.000\n116.150 1132.000 1069.000\n116.200 1133.000 1196.000\n116.250 1133.000 1070.000\n116.300 1134.000 1197.000\n116.350 1134.000 1071.000\n116.400 1135.000 1198.000\n116.450 1135.000 1072.000\n116.500 1136.000 1199.000\n116.550 1136.000 1073.000\n116.600 1137.000 1200.000\n116.650 1137.000 1074.000\n116.700 1138.000 1201.000\n116.750 1138.000 1075.000\n116.800 1139.000 1202.000\n116.850 1139.000 1076.000\n116.900 1140.000 1203.000\n116.950 1140.000 1077.000\n117.000 1141.000 1204.000\n117.050 1141.000 1078.000\n117.100 1142.000 1205.000\n117.150 1142.000 1079.000\n117.200 1143.000 1206.000\n117.250 1143.000 1080.000\n117.300 1144.000 1207.000\n117.350 1144.000 1081.000\n117.400 1145.000 1208.000\n117.450 1145.000 1082.000\n117.500 1146.000 1209.000\n117.550 1146.000 1083.000\n117.600 1147.000 1210.000\n117.650 1147.000 1084.000\n117.700 1148.000 1211.000\n117.750 1148.000 1085.000\n117.800 1149.000 1212.000\n117.850 1149.000 1086.000\n117.900 1150.000 1213.000\n117.950 1150.000 1087.000\n(7) 978.0 MHz is authorized for Universal Access Transceiver service.\n(8) 1300-1350 MHz: The use of this band is restricted to surveillance radar stations and associated airborne transponders.\n(9) 1559-1626.5 MHz: The use of this band is limited to airborne electronic aids to air navigation and any associated land stations.\n(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.\n(11) 5000-5250 MHz: This band is to be used for the operation of the international standard system (microwave landing system).\n(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.\n(13) 15,400-15,700 MHz: This band is available for use of land stations associated with airborne electronic aids to air navigation.\n(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.\n(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.\n(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:\n(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.\n(ii) The pulse repetition rate (PRR) of the 1030 MHz ATC radar beacon test set will be 235 pulses per second (pps) ±5pps.\n(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.\n(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:\n(1) Not cause harmful interference to voice communications on these frequencies or any harmonically related frequency.\n(2) Coordinate with the appropriate FAA Regional Spectrum Management Office prior to each activation of the transmitter.\n(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.\n(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.\n(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.","path":["Title 47—Telecommunication","CHAPTER I—FEDERAL COMMUNICATIONS COMMISSION","SUBCHAPTER D—SAFETY AND SPECIAL RADIO SERVICES","PART 87—AVIATION SERVICES","Subpart Q—Stations in the Radiodetermination Service"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-47.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:28Z","sha256":"e5fd4f7adeb27c7a7aa2d3bed2c9ab3ae2a7bbb2624f6a46d418d2442ea65fc3","source_id":"us-cfr","stale":true,"prev":"us/47-cfr-87.473","next":"us/47-cfr-87.477"},"notice":"GroundRules: Original legal text. Not legal advice."}