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Licensees holding a valid authorization on June 11, 1982, to operate on the frequencies 169.576, 170.375 or 171.975 MHz may continue to be authorised for such operations on the condition that harmful interference will not be caused to Government stations.

US14 When 500 kHz is being used for distress purposes, ship and coast stations using morse telegraph may use 512 kHz for calling.

US18 Navigation aids In the US and possessions in the bands 9-14 kHz, 90-110 kHz, 190-415 kHz, 510-535 kHz, 2700-2900 MHz are normally operated by the U.S. Government. However, authorizations may be made by the FCC for non-Government operation In these bands subject to the conclusion of appropriate arrangements between the FCC and the Government agencies concerned and upon special showing of need for service which the Government is not yet prepared to render.

US25 The use of frequencies In the band 25.85-26.1 MHz may be authorized in any area to non-Government remote pickup broadcast base and mobile stations on the condition that harmful interference is not caused to stations in the broadcasting service.

US26 The bands 117.975-121.4125 MHz. 123.5875-128.8125 MHz and 132 0125 136 0 MHz are for air traffic control communications.

US28 The band 121.5875-121.9375 MHz la for use by aeronautical utility land and mobile stations, and for air traffic control communications.

US30 The band 121.9375-123.0875 MHz is available to FAA aircraft for communications pursuant to flight inspection functions in accordance with the Federal Aviation Act of 1958.

US31 Except as provided below the band 121.9375-123.0875 MHz is for use by private aircraft stations.

The frequencies 122.700, 122.725. 122.750. 122800. 122.960. 122.976. 123.000. 123.060 and

123.075 MHz may be assigned to aeronautical advisory stations. In addition, at landing areas having a part-time or no airdrome control tower or FAA flight service station, these frequencies may be assigned on a secondary non-interference basis to aeronautical utility mobile stations, and may be used by FAA ground vehicles for safety related communications during Inspections conducted at such landing areas.

The frequencies 122.850. 122.900 and 122.925 MHz may be assigned to aeronautical multicom stations. In addition, 122.850 MHz may be assigned on a secondary noninterference basis to aeronautical utility mobile stations. In case of 122.925 MHz. US213 applies.

Air carrier aircraft stations may use 122.000 and 122.050 MHz for communication with aeronautical stations of the Federal Aviation Administration and 122.700. 122.800. 122.900 and 123.000 MHz for communications with aeronautical stations pertaining to safety of flight with and in the vicinity of landing areas not served by a control tower.

Frequencies in the band 121.9375-122.6875 MHz may be used by aeronautical stations of the Federal Aviation Administration for communication with private aircraft stations only, except that 122.000 and 122.060 MHz may also be used for communication with air carrier aircraft stations concerning weather information.

US32 Except for the frequencies 123.3 and 123.5 MHz, which are not authorized for Government use. the band 123.1125-123.5875 MHz is available for FAA communications incident to flight test and inspection activities pertinent to aircraft and facility certification on a secondary noninterference basis.

US33 The band 123.1125-123.5875 MHz is for use by flight test and aviation instructional stations. The frequency 121.960 MHz is available for aviation Instructional stations.

U841 The Government radiolocation service Is permitted In the band 2450-2500 MHz on condition that harmful interference is not caused to non-Government services.

US44 The non-Government radiolocation service may be authorized in the band 29003100 MHz on the condition that no harmful Interference is caused to Government services.

US48 The non-Government radiolocation service may be authorised in the bands 53505460 MHz and 9000-8200 MHz on the condition that It does not cause harmful Interference to the aeronautical radionavlgation service or to the Government radiolocation service.

US49 The non-Government radiolocation service may be authorised in the band 54605470 MHz on the condition that it does not cause harmful Interference to the aeronautical or maritime radionavlgation services or to the Government radiolocation service.

US50 The non-Government radiolocation service may be authorised in the band 64705600 MHz on the condition that it does not cause harmful interference to the maritime radionavigation service or to the Government radiolocation service.

US51 In the band 5600-5650 MHz and 9300 9500 MHz, the non-Government, radiolocation service shall not cause harmful interference to the Government radiolocation service.

US53 In view of the fact that the band 13.25-13.4 GHz is allocated to doppler navigation aids. Government, and non-Government airborne doppler radars in the aeronautical radionavigation service are permitted in the band 8750-8850 MHz only on the condition that they must accept any interference that may be experienced from stations In the radiolocation service In the band 8500-10000 MHz.

US54 Temporarily, and until certain operations of the radiolocation service in the band 9000-9200 MHz can be transferred to other appropriate frequency bands, the aeronautical radionavigation service may. in certain geographical areas, be subject to receiving some degree of interference from the radiolocation service.

US58 In the band 10000-10500 MHz, pulsed emissions are prohibited, except for weather radars on board meteorological satellites in the band 10000-10025 MHz. The amateur service and the non-Government radiolocation service, which shall not cause harmful interference to the Government radiolocation service, are the only non-Government services permitted in this band. The non-Government radiolocation service is limited to survey operations as specified in footnote US108.

US59 The band 10.5-10.56 GHz is restricted to systems using type NON (AO) emission with a power not to exceed 40 watts into the antenna.

US65 The use of the band 5460-5650 MHz by the maritime radionavigation service is limited to shlpborne radars.

US66 The use of the band 9300-9500 MHz by the aeronautical radionavigation service is limited to airborne radars and associated airborne beacons. In addition, ground-based radar beacons in the aeronautical radionavigation service are permitted In the band 9300-9320 MHz on the condition that harmful Interference is not caused to the maritime radionavigation service.

US67 The use of the band 9300-9500 MHz by the meteorological aids service Is limited to ground-based radars. Radiolocation Installations will be coordinated with the meteorological aids service and. insofar as practicable, will be adjusted to meet the requirements of the meteorological aids service.

US69 In the band 31.8-33.4 GHz, groundbased radionavigation aids are not permitted except where they operate in cooperation with airborne or shlpborne radionavigation devices.

US70 The meteorological aids service allocation in the band 400.15-406.0 MHz doe not preclude the operation therein of associated ground transmitters.

US71 In the band 9300-9320 MHz. low-powered maritime radionavigation stations shall be protected from harmful Interference caused by the operation of land-based equipment.

US74 In the bands 25.56-2S.S7. 73.0-74A 406.1-410.0. 608-614. 1400-1427. 168O.5-1670.0 2690-2700 and 4990-5000 MHz and In the band> 10.68-10.7. 15.35-15.4. 23.6-24.0. 31.3-31.5, 86-81 105-116 and 217-231 GHz. the radio astronomy service shall be protected from extraband radiation only to the extent that such radiation exceeds the level which would be present if the offending station were operating in compliance with the technical standards or criteria applicable to the service is which it operates.

US77 Government stations may also bt authorized:

(a) Port operations use on a simplex baztf by coast and ship stations of the frequencies 156.6 and 156.7 MHz;

(b) Duplex port operations use of the frequency 157.0 MHz for ship stations and 161.6 MHz for coast stations;

(c) Inter-ship use of 156.3 MHz on a simple* basis; and

(d) Vessel traffic services under the control of the U.S. Coast Guard on a simplex basis bj coast and ship stations on the frequencies 156.25, 156.55. 156.6 and 156.7 MHz.

(e) Navigational bridge-to-brldge and navigational communications on a simplex bads by coast and ship stations on the frequencies 156.375 and 156.65 MHz.

US78 The frequencies between 1435 and 1535 MHz will be assigned for aeronautical telemetry and associated telecommand operations for flight testing of manned or unmanned aircraft and missiles, or their major components. Permissible usage Includes telemetry associated with launching and reentry into the earth's atmosphere as well at any incidental orbiting prior to reentry of manned objects undergoing flight tests. To* following frequencies are shared with flight telemetering mobile stations: 1444.5, 146U. 1501.5. 1516.5, 1624.5 and 1625.6 MHz. In t.v band 1530-1636 MHz, the Maritime MobileSatellite Service will be the only prlmao service after January 1.1990.

US80 Government stations may use the frequency 122.9 MHz subject to the followtnf conditions:

(a) All operations by Government station* shall be restricted to the purpose for which the frequency Is authorized to non-Government stations, and shall be In accordance with the appropriate provisions of the Commission's Rules and Regulations. Part 87. Aviation Services:

(b) Use of the frequency is required for coordination of activities with Commission licensees operating on this frequency; and

(c) Government stations will not be authorized for operation at fixed locations.

US81 The band 38.0-38.2S MHz Is used by both Government and non-Government radio astronomy observatories. No new fixed or mobile assignments are to be made and Government stations In the band 38.0—38.25 MHz will be moved to other bands on a case-bycase basis, as required, to protect radio astronomy observations from harmful interference. As an exception, however, low powered military transportable and mobile stations used for tactical and training purposes will continue to use the band. To the extent practicable, the latter operations will be adjusted to relieve such interference as may be caused to radio astronomy observations. In the event of harmful Interference from such local operations, radio astronomy observatories may contact local military commands directly, with a view to effecting relief. A list of military commands, areas of coordination, and points of contact for purposes of relieving interference may be obtained upon request from the Office of the Chief Engineer, Federal Communications Commission, Washington, D.C. 20554.

US82 Until July 1, 1961, the assignable frequencies In the bands 4143.6-4146.6 kHz, 6218.6-6224.6 kHz, 8291.1-4297.3 kHz, 12429.212439.5 kHz, 16587.1-16596.4 kHz and 2212422139.5 kHz may be authorized on a shared nonprlority basis to Government and nonGovernment ship and coast stations (SSB telephony, with peak envelope power not to exceed 1 kW). Effective July 1, 1991, the assignable frequencies In the bands 4146-4152 kHz, 6224-6233 kHz. 8294-8300 kHz. 12353-12368 kHz. 16528-16549 kHz. 18825-18846 kHz. 22159-22180 kHz. and 25100-25121 kHz may be authorized on a shared non-priority basis to Government and non-Government ship and coast stations (SSB telephony, with peak envelope power not to exceed 1 kW).

US87 The frequency 450 MHz, with maximum emission bandwidth of 500 kHz, may be used by Government and non-Government stations for space telecommand at specific locations, subject to such conditions as may be applied on a case-by-case basis.

US90 In the band 2025—2110 MHz earth-tospace and space-to-space transmissions may be authorized In the space research and earth exploration-satellite services subject to such conditions as may be applied on a case-bycase basis. Such transmissions shall not cause harmful Interference to non-Government stations operating in accordance with the Table of Frequency Allocations. All space-to-space transmissions reaching the earth's surface shall adhere to a power flux density of between -144 and -154 (dbw/(m»y 4 kHz depending on the angle of arrival per ITU Radio Regulation 2557 and shall not

cause harmful interference to the other space services.

US93 In the conterminous United States. the frequency 108.0 MHz may be authorized for use by VOR test facilities, the operation of which is not essential for the safety of life or property, subject to the condition that no interference is caused to the reception of FM broadcasting stations operating In the band 88—108 MHz. In the event that such Interference does occur, the licensee or other agency authorized to operate the facility shall discontinue operation on 108 MHz and shall not resume operation until the interference has been eliminated or the complaint otherwise satisfied. VOR test facilities operating on 108 MHz will not be protected against Interference caused by FM broadcasting stations operating In the band 88— 108 MHz not shall the authorization of a VOR test facility on 108 MHz preclude the Commission from authorizing additional FM broadcasting stations.

US99 In the band 1668.4—1670.0 MHz, the meteorological aids service (radiosonde) will avoid operations to the maximum extent practicable. Whenever it is necessary to operate radiosondes in the band 1668.4—1670 MHz within the United States, notification of the operations shall be sent as far in advance as possible to the Electromagnetic Management Unit, National Science Foundation, Washington. D.C. 20550.

US102 In Alaska only, the frequency 122.1 MHz may also be used for air carrier air traffic control purposes at locations where other frequencies are not available to air carrier aircraft stations for air traffic control.

US104 The LORAN Radlonavigatlon System has priority in band 90—110 kHz in the United States and possessions. Radiolocation land stations making use of LORAN type equipment may be authorized to both Government and non-Government on a secondary service basis for offshore radiolocation activities only at specific locations and subject to such technical and operational conditions (e.g., power, emission, pulse rate and phase code, hours of operation), including on-the-air testing, as may be required on a case-by-case basis to ensure protection of the LORAN radlonavigatlon system from harmful interference and to ensure mutual compability among radiolocation operators. Such authorizations to stations in the radiolocation service are further subject to showing of need for service which is not currently provided and which the Government Is not yet prepared to render by way of the radionavigation service.

US106 The frequency 156.75 MHz is available for assignment to non-Government and Government stations for environmental communications in accordance with an agreed plan.

US107 The frequency 156.8 MHz is the national distress, safety and calling frequency

for the maritime mobile VHP radiotelephone service for use by Government and non-Government ship and coast stations. Guard bands of 156.7626—156.7875 and 156.8125— 156.8375 MHz are maintained.

US108 Within the bands 3300—3500 MHz and 10000—10500 MHz, survey operations, using- transmitters with a peak power not to exceed five watts into the antenna, may be authorized for Government and non-Government use on a secondary basis to other Government radiolocation operations.

US110 In the frequency bands 3100—3300 MHz, 3500-3700 MHz, 5250—5350 MHz. 8500— 9000 MHz. 9200—9300 MHz, 9500—10000 MHz, 13.4—14.0 GHz. 15.7—17.3 GHz, 24.05—24.25 GHz and 33.4—36.0 GHz, the non-Government radiolocation service shall be secondary to the Government radioactive service and to airborne doppler radars at 8800 MHz, and shall provide protection to airport surface detection equipment (ASDE) operating between 15.7—16.2 GHz.

USUI In the band 1990—2120 MHz. Government space research earth stations may be authorized to use specific frequencies at specific locations for earth-to-space transmissions. Such authorizations shall be secondary to non-Government use of this band and subject to such other conditions as may be applied on a case-by-case basis. Corpus Christl, Tex., 27*39TM., 097*23^. Fairbanks, Alaska. 64*59TM., 147*53^. Goldstone, Calif., 35*18TM.. 116°54'W. Greenbelt, Md.. 39*0014., 076*50T?. Guam, Mariana Is., 13*19TM.. 144*44'E. Kauai, Hawaii, 22*08TM.. 159'40'W. Merritt Is., Fla.. 28*29TM.. 060*35^. Rosman. N.C., 35*12TM.. 082*52TV. Wallops Is., Va.. 37*57TM., 075°20'W.

exceeding this power are permitted to continue in use.

New authorizations in this band stations other than mobile stations, within the following areas are subject to prior coordination by the applicant through the Electromagnetic Spectrum Management Unit. National Science Foundation, Washington, D.C 20550,(202-357-9696):

Arecibo Observatory:

Rectangle between latitudes 17*30"N. and 19*00TM. and between longitudes eS'lO* W. and 68*00W.

Owens Valley Radio Observatory:

Two contiguous rectangles, one between latitudes 36*N. and 37*N. and longitudes lirww. and 118*30W. and the second between latitudes 37*N. and 38*N. and longitudes 118*W. and 118*50TV.

Sagamore Hill Radio Observatory:

Rectangle between latitudes 42*loTM. and 43*00TM. and longitudes 70*31^. and 71 "WW.

Table Mountain Solar Observatory (NOAA), Boulder. Colorado (407-409 MHz only):

Rectangle between latitudes 39*30TM. and 40*30TM. and longitudes 104*30'W. and 10S*OOT»" or the Continental Divide whichever is farther east.

The non-Government use of this band is limited to the radio astronomy service and as provided by footnote US13.

US201 In the band 460-470 MHz. space stations in the earth exploration-satellite service may be authorized for space-to-earUi transmissions on a secondary basis with respect to the fixed and mobile services. When operating in the meteorological-satellite service, such stations shall be protected from harmful Interference from other application*

Bands To Be Observed

of the earth exploration-satellite service US112 The frequency 123.1 MHz is for The power flux produced at the earth's sursearch and rescue communications. This fre- face by any space station in this band shall quency may be assigned for air traffic con- not exceed -152 dBW/m% kHz. trol communications at special aeronautical US203 Radio astronomy observations of events on the condition that no harmful In- the formaldehyde line frequencies 4£25-483f> terference Is caused to search and rescue MHz and 14.470-14.500 GHz may be made at communications during any period of search certain radio astronomy observatories as 1dand rescue operations in the licale involved. dicated below

US116 In the bands 890-802 MHz and 935941 MHz, no new assignments are to be made to Government radio stations after July 10, 1970 except on case-by-case basis, to expertmental stations and to additional stations of existing networks In Alaska. Government assignments existing- prior to July 10 1970 to stations in Alaska may be continued. All other existing Government assignments shall be on a secondary basis to stations In the non-Government land mobile service and shall be subject to adjustment or removal from the bands 890-902 MHz, 928-932 MHz and 935-941 MHz at the request of the FCC.

US117 In the band 406.1-410 MHz, all new authorizations will be limited to a maximum 7 watts per kHz of necessary bandwidth; existing authorizations as of November 30. 1970

[table]

Every practicable effort will be made to avoid the assignment of frequencies to stations In the fixed or mobile services in these bands. Should such assignments result in harmful Interference to these observations, the situation will be remedied to the extent practicable.

US205 Tropospheric scatter systems are prohibited in the band 2500-2690 MHz.

US208 Planning and use of the band 15591636.5 MHz necessitate the development of technical and/or operational sharing criteria to ensure the maximum degree of electromagnetic compatibility with existing and planned systems within the band.

US209 The use of frequencies 460.6625, 460.6875, 460.7125, 460.7375, 460.7625. 460.7875, 460.8125. 460.8375. 460.8625. 465.6625. 465.6875. 465.7125. 465.7375. 465.7625. 465.7875. 465.8125, 465.8375. and 466.8625 MHz may be authorized, with 100 mW or less output power, to Governrnent and non-Government radio stations for one-way, non-voice bio-medical telemetry operations in hospitals, or medical or convalescent centers.

US210 Use of frequencies In the bands 40.66-40.70 and 216-220 MHz may be authorized to Government and non-Government stations on a secondary basis for the tracking of. and telemetering of scientific data from, ocean buoys and wildlife. Airborne wildlife telemetry In the 216-220 MHz band will be limited to the 216.0-216.1 MHz portion of the band. Operation in these two bands is subject to the technical standards specified in: (a) Section 8.2.42 of the NTIA Manual for Government use, or (b) Section 5.108 of the Cornmission's Rules for non-Government use.

US211 In the bands 1670-1690. 5000-5250 MHz and 10.7-11.7. 16.1365-15.35. 15.4-15.7. 22.522.55. 24-24.06. 31.0-31.3. 31.8-32.0. 40.5-42.5. 8486. 102-106, 116-126. 151-164. 176.5-182, 186-190. 231-235. 252-265 GHz, applicants for airborne or space station assignments are urged to take all practicable steps to protect radio astronomy observations in the adjacent lands from harmful Interference; however. U874 applies.

US212 In the State of Alaska, the carrier frequency 5167.5 kHz (assigned frequency 5168.9 kHz) is designated for emergency communications. This frequency may also be used in the Alaska-Private Fixed Service for calling and listening, but only for establishing communications before switching to another frequency. The maximum power is limited to 150 watts peak envelope power (PEP).

US213 The frequency 122.925 MHz is for use only for communications with or between aircraft when coordinating natural resources programs of Federal or State natural resources, agencies, including forestry management and fire suppression, fish and game management and protection and environmental monitoring and protection.

US214 The frequency 157.1 MHz is the primary frequency for liaison communications

between ship stations and stations of the United States Coast Guard.

US215 Emissions from microwave ovens manufactured on and after January 1. 1960, for operation on the frequency 915 MHz must be confined within the band 902-828 MHz. Emissions from microwave ovens manufactured prior to January 1, 1980, for operation on the frequency 915 MHz must be confined within the band 902-940 MHz. Radlocommunications services operating in the band 928-940 MHz must accept any harmful Interference from the operation of microwave ovens manufactured before January 1, 1980.

US216 The frequencies 150.775 and 150,790. and the bands 152-152.0150, 163.2375-163.2625. 462.9375-463.1875 and 467.9375-468.1875 MHz are authorized for Governmelttaon-Governmelt operations in medical radio commulicatlons systems.

US217 Pulse-ranging radimlocatlon systems may be authorized for Governmelt and non-Government use in the 420-450 MHz band along the shorelines of Alaska and the contiguous 48 states. Spread spectrum radiolocation systems may be authorized in the 420-435 MHz portion of the band for operation within the contiguous 48 States and Alaska. Authorizations will be eranted on a case-bycase basis; howeter. operations proposed to be located within the zones set forth in US228 should not expect mi be accommodated. All stations operating In accordance with this provision will be secondary to stations operating in accordance with the Table of Frequency Allocations.

US218 The bans segments 902-912 MHz and 918-923 MHz are available for Automatic Vehicle Monitoring (AVM) Systems subject to not causing harmful interference to the operation of Government stations authorized In these bands. These systems must tolerate any Interference from the operation of industrial, scientific, and medical (ISM) devices and the operation of Government stations authorized in these bands.

US219 In the band 2025-2110 MHz Government Earth resources satellite Earth stations in the Earth exploration-satellite service may be authorized to use the frequency 2106.4 MHz for Earth-to-space transmission for tracking, telemetry, and telecommand at the sites listed below. Such transmissions shall not cause harmful interference to nonGovernment operations: Sioux Falls. South Dakota. 43-32031 N .

96M5-42.8" W. Fairbanks. Alaska. 64°58 36 6" N.. 147TW54.2"

W.

US220 The frequencies 36.25 and 41.71 MHz may be authorized to Government stations and non-Government stations In the petroleum radio service, for oil spill containment and cleanup operations. The use of these frequencies for oil spill containment or cleanup

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