Title 47: Telecommunication
PART 22—PUBLIC MOBILE SERVICES
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Subpart I—Offshore Radiotelephone Service
§ 22.1001 Scope.
The rules in this subpart govern the licensing and operation of offshore radiotelephone stations. The licensing and operation of these stations and systems is also subject to rules elsewhere in this part that apply generally to the public mobile services. However, in case of conflict, the rules in this subpart govern.
§ 22.1003 Eligibility.
Any eligible entity (see §22.7) may apply for central station license(s) and/or offshore subscriber licenses under this subpart.
[70 FR 19312, Apr. 13, 2005]
§ 22.1005 Priority of service.
Facilities in the Offshore Radiotelephone Service are intended primarily for rendition of public message service between offshore subscriber and central stations. However, they may also be used to render private leased line communication service, provided that such usage does not reduce or impair the extent or quality of communication service which would be available, in the absence of private leased line service, to the general public receiving or subsequently requesting public message service from an offshore central station.
§ 22.1007 Channels for offshore radiotelephone systems.
The channels listed in this section are allocated for paired assignment to transmitters located in the specified geographical zones that provide offshore radiotelephone service. All channels have a bandwidth of 20 kHz and are designated by their center frequencies in MegaHertz.
(a) Zone A—Southern Louisiana. The geographical area in Zone A is bounded as follows:
From longitude W.87°45' on the East to longitude W.94°00' on the West and from the 4.8 kilometer (3 mile) limit along the Gulf of Mexico shoreline on the North to the limit of the Outer Continental Shelf on the South.
(1) These channels may be assigned for use by offshore central (base/fixed) or subscriber stations (fixed, temporary fixed, surface and/or airborne mobile) as indicated, for voice-grade general communications:
------------------------------------------------------------------------ Central Subscriber Central Subscriber------------------------------------------------------------------------488.025...................... 491.025 488.225......... 491.225488.050...................... 491.050 488.250......... 491.250488.075...................... 491.075 488.275......... 491.275488.100...................... 491.100 488.300......... 491.300488.125...................... 491.125 488.325......... 491.325488.150...................... 491.150 488.350......... 491.350488.175...................... 491.175 488.375......... 491.375488.200...................... 491.200 488.400......... 491.400------------------------------------------------------------------------
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(2) These channels may be assigned for use by offshore central (base/fixed) or subscriber stations (fixed, temporary fixed, surface and/or airborne mobile) as indicated, for voice-grade general communications and private line service:
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------------------------------------------------------------------------ Central Subscriber Central Subscriber------------------------------------------------------------------------488.425...................... 491.425 488.575......... 491.575488.450...................... 491.450 488.600......... 491.600488.475...................... 491.475 488.625......... 491.625488.500...................... 491.500 488.650......... 491.650488.525...................... 491.525 488.675......... 491.675488.550...................... 491.550 488.700......... 491.700------------------------------------------------------------------------
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(3) These channels may be assigned for use by relay stations in systems where it would be impractical to provide offshore radiotelephone service without the use of relay stations.
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------------------------------------------------------------------------ Central Subscriber Central Subscriber------------------------------------------------------------------------488.725...................... 491.725 488.775......... 491.775488.750...................... 491.750 488.800......... 491.800------------------------------------------------------------------------
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(4) These channels may be assigned for use by offshore central (base/fixed) or subscriber stations (fixed, temporary fixed, surface and/or airborne mobile) as indicated, for emergency communications involving protection of life and property.
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------------------------------------------------------------------------ Central Subscriber Central Subscriber------------------------------------------------------------------------488.825...................... 491.825 488.875......... 491.875488.850...................... 491.850 488.900......... 491.900------------------------------------------------------------------------
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(5) These channels may be assigned for use by offshore central (base/fixed) or subscriber stations (fixed, temporary fixed, surface and/or airborne mobile) as indicated, for emergency auto alarm and voice transmission pertaining to emergency conditions only.
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------------------------------------------------------------------------ Central Subscriber------------------------------------------------------------------------ 488.950................ 491.950------------------------------------------------------------------------
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(6) These channels may be assigned for use by offshore central (base/fixed) or subscriber stations (fixed, temporary fixed, surface and/or airborne mobile) as indicated, for emergency shut-off remote control telemetry, environmental data acquisition and disseminations, or facsimile transmissions.
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------------------------------------------------------------------------ Central Subscriber Central Subscriber------------------------------------------------------------------------489.000...................... 492.000 489.200......... 492.200489.025...................... 492.025 489.225......... 492.225489.050...................... 492.050 489.250......... 492.250489.075...................... 492.075 489.275......... 492.275489.100...................... 492.100 489.300......... 492.300489.125...................... 492.125 489.325......... 492.325489.150...................... 492.150 489.350......... 492.350489.175...................... 492.175 489.375......... 492.375------------------------------------------------------------------------
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(7) These channels may be assigned for use by offshore central (base/fixed) or subscriber stations (fixed, temporary fixed, surface and/or airborne mobile) as indicated, for private line service:
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------------------------------------------------------------------------ Central Subscriber Central Subscriber------------------------------------------------------------------------489.400...................... 492.400 489.725......... 492.725489.425...................... 492.425 489.750......... 492.750489.450...................... 492.450 489.775......... 492.775489.475...................... 492.475 489.800......... 492.800489.500...................... 492.500 489.825......... 492.825489.525...................... 492.525 489.850......... 492.850489.550...................... 492.550 489.875......... 492.875489.575...................... 492.575 489.900......... 492.900489.600...................... 492.600 489.925......... 492.925489.625...................... 492.625 489.950......... 492.950489.650...................... 492.650 489.975......... 492.975489.675...................... 492.675 490.000......... 493.000489.700...................... 492.700------------------------------------------------------------------------
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(8) Interstitial channels. Interstitial channels are those with center frequencies offset by ±12.5 kHz from the listed center frequencies. The FCC may assign interstitial channels to offshore stations in Zone A subject to the following conditions:
(i) Offshore stations transmitting on interstitial channels must be located east of W.92° longitude.
(ii) Operations on interstitial channels are considered to be secondary to operations on channels with the listed center frequencies.
(iii) Offshore stations operating on interstitial channels must be used only for voice grade general communications or to provide for private line service.
Note to paragraph (a) of §22.1007: These channels are contained in UHF TV Channel 17.
(b) Zone B—Southern Louisiana—Texas. (1) The geographical area in Zone B is bounded as follows:
From longitude W.87°45' on the East to longitude W.95°00' on the West and from the 4.8 kilometer (3 mile) limit along the Gulf of Mexico shoreline on the North to the limit of the Outer Continental Shelf on the South.
(2) These channels may be assigned for use by offshore central (base/fixed) or subscriber stations (fixed, temporary fixed, surface and/or airborne mobile) as indicated, for voice-grade general communications and private line service:
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------------------------------------------------------------------------ Central Subscriber Central Subscriber------------------------------------------------------------------------485.025...................... 482.025 486.025......... 483.025485.050...................... 482.050 486.050......... 483.050485.075...................... 482.075 486.075......... 483.075485.100...................... 482.100 486.100......... 483.100485.125...................... 482.125 486.125......... 483.125485.150...................... 482.150 485.150......... 483.150485.175...................... 482.175 486.175......... 483.175485.200...................... 482.200 486.200......... 483.200485.225...................... 482.225 486.225......... 483.225485.250...................... 482.250 486.250......... 483.250485.275...................... 482.275 486.275......... 483.275485.300...................... 482.300 486.300......... 483.300485.325...................... 482.325 486.325......... 483.325485.350...................... 482.350 486.350......... 483.350485.375...................... 482.375 486.375......... 483.375485.400...................... 482.400 486.400......... 483.400485.425...................... 482.425 486.425......... 483.425485.450...................... 482.450 486.450......... 483.450485.475...................... 482.475 486.475......... 483.475485.500...................... 482.500 486.500......... 483.500485.525...................... 482.525 486.525......... 483.525485.550...................... 482.550 484.550......... 483.550485.575...................... 482.575 486.575......... 483.575485.600...................... 482.600 486.600......... 483.600485.625...................... 482.625 486.625......... 483.625485.650...................... 482.650 486.650......... 483.650485.675...................... 482.675 486.675......... 483.675485.700...................... 482.700 486.700......... 483.700485.725...................... 482.725 486.725......... 483.725485.750...................... 482.750 486.750......... 483.750485.775...................... 482.775 486.775......... 483.775485.800...................... 482.800 486.800......... 483.800485.825...................... 482.825 486.825......... 483.825485.850...................... 482.850 486.850......... 483.850485.875...................... 482.875 486.875......... 483.875485.900...................... 482.900 486.900......... 483.900485.925...................... 482.925 486.925......... 483.925485.950...................... 482.950 486.950......... 483.950485.975...................... 482.975 486.975......... 483.975486.000...................... 483.000 487.050......... 480.050------------------------------------------------------------------------
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Note to paragraph (b) of §22.1007: These channels are contained in UHF TV Channel 16.
(c) Zone C—Southern Texas. The geographical area in Zone C is bounded as follows:
Longitude W.94°00' on the East, the 4.8 kilometer (3 mile) limit on the North and West, a 282 kilometer (175 mile) radius from the reference point at Linares, N.L., Mexico on the Southwest, latitude N.26°00' on the South, and the limits of the outer continental shelf on the Southeast.
(1) These channels may be assigned for use by offshore central (base/fixed) or subscriber stations (fixed, temporary fixed, surface and/or airborne mobile) as indicated, for emergency auto alarm and voice transmission pertaining to emergency conditions only.
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------------------------------------------------------------------------ Central Subscriber------------------------------------------------------------------------ 476.950................ 479.950------------------------------------------------------------------------
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(2) These channels may be assigned for use by offshore central (base/fixed) or subscriber stations (fixed, temporary fixed, surface and/or airborne mobile) as indicated, for voice-grade general communications and private line service:
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476.025 479.025 476.050 479.050 476.075 479.075 476.100 479.100 476.125 479.125 476.150 479.150 476.175 479.175 476.200 479.200 476.225 479.225 476.250 479.250 476.275 479.275 476.300 479.300 476.325 479.325 476.350 479.350 476.375 479.375 476.400 479.400 476.425 479.425 476.450 479.450 476.475 479.475 476.500 479.500 476.525 479.525 476.550 479.550 476.575 479.575 476.600 479.600 476.625 479.625 476.650 479.650 476.675 479.675 476.700 479.700 476.725 479.725 476.750 479.750 476.775 479.775 476.800 479.800 476.825 479.825 476.850 479.850 476.875 479.875 476.900 479.900 477.000 480.000 477.025 480.025 477.075 480.075 477.100 480.100 477.125 480.125 477.150 480.150 477.175 480.175 477.200 480.200 477.225 480.225 477.250 480.250 477.275 480.275 477.300 480.300 477.325 480.325 477.350 480.350 477.375 480.375 477.400 480.400 477.425 480.425 477.450 480.450 477.475 480.475 477.500 480.500 477.525 480.525 477.550 480.550 477.575 480.575 477.600 480.600 477.625 480.625 477.650 480.650 477.675 480.675 477.700 480.700 477.725 480.725 477.750 480.750 477.775 480.775 477.800 480.800 477.825 480.825 477.850 480.850 477.875 480.875 477.900 480.900 477.925 480.925 477.950 480.950 477.975 480.975
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[59 FR 59507, Nov. 17, 1994; 60 FR 9891, Feb. 22, 1995] § 22.1009 Transmitter locations.
The rules in this section establish limitations on the locations from which stations in the Offshore Radiotelephone Service may transmit.
(a) All stations. Offshore stations must not transmit from locations outside the boundaries of the appropriate zones specified in §22.1007. Offshore stations must not transmit from locations within 241 kilometers (150 miles) of any full-service television station that transmits on the TV channel containing the channel on which the offshore station transmits.
(b) Airborne subscriber stations. Airborne subscriber stations must not transmit from altitudes exceeding 305 meters (1000 feet) above mean sea level. Airborne mobile stations in Zone A must not transmit from locations within 129 kilometers (80 miles) of Lake Charles, Louisiana. Airborne mobile stations in Zone B must not transmit from locations within 129 kilometers (80 miles) of Lafayette, Louisiana. Airborne mobile stations in Zone C must not transmit from locations within 129 kilometers (80 miles) of Corpus Christi or locations within 129 kilometers (80 miles) of Houston, Texas. § 22.1011 Antenna height limitations.
The antenna height of offshore stations must not exceed 61 meters (200 feet) above mean sea level. The antenna height of offshore surface mobile stations must not exceed 10 meters (30 feet) above the waterline. § 22.1013 Effective radiated power limitations.
The effective radiated power (ERP) of transmitters in the Offshore Radiotelephone Service must not exceed the limits in this section.
(a) Maximum power. The ERP of transmitters in this service must not exceed 1000 Watts under any circumstances.
(b) Mobile transmitters. The ERP of mobile transmitters must not exceed 100 Watts. The ERP of mobile transmitters, when located within 32 kilometers (20 miles) of the 4.8 kilometer (3 mile) limit, must not exceed 25 Watts. The ERP of airborne mobile stations must not exceed 1 Watt.
(c) Protection for TV Reception. The ERP limitations in this paragraph are intended to reduce the likelihood that interference to television reception from offshore radiotelephone operations will occur.
(1) Co-channel protection. The ERP of offshore stations must not exceed the limits in Table I–1 of this section. The limits depend upon the height above mean sea level of the offshore transmitting antenna and the distance between the antenna location of the offshore transmitter and the antenna location of the main transmitter of the nearest full-service television station that transmits on the TV channel containing the channel on which the offshore station transmits.
(2) Adjacent channel protection. The ERP of offshore stations located within 128.8 kilometers (80 miles) of the main transmitter antenna of a full service TV station that transmits on a TV channel adjacent to the TV channel which contains the channel on which the offshore station transmits must not exceed the limits in the Table I–2 of §22.1015. The limits depend upon the height above mean sea level of the offshore transmitting antenna and the distance between the location of the offshore transmitter and the 4.8 kilometer (3 mile) limit.
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Table I-1_Maximum ERP (Watts)------------------------------------------------------------------------ 30 45 61 meters meters meters Distance (100 (150 (200 feet) feet) feet)------------------------------------------------------------------------338 km (210 mi).............................. 1000 1000 1000330 km (205 mi).............................. 1000 900 8002 km (200 mi)................................ 800 710 630314 km (195 mi).............................. 590 520 450306 km (190 mi).............................. 450 400 330298 km (185 mi).............................. 320 280 240290 km (180 mi).............................. 250 210 175282 km (175 mi).............................. 180 150 130274 km (170 mi).............................. 175 110 100266 km (165 mi).............................. 95 80 70258 km (160 mi).............................. 65 55 50249 km (155 mi).............................. 50 40 35241 km (150 mi).............................. 35 30 25------------------------------------------------------------------------
§ 22.1015 Repeater operation.
Offshore central stations may be used as repeater stations provided that the licensee is able to maintain control of the station, and in particular, to turn the transmitter off, regardless of whether associated subscriber stations are transmitting at the time.
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Table I-2_Maximum ERP (Watts)------------------------------------------------------------------------ 30 61 meters meters Distance from the 4.8 km (3 mi) limit (100 (200 feet) feet)------------------------------------------------------------------------6.4 km (4 mi)......................................... 25 68.0 km (5 mi)......................................... 40 109.7 km (6 mi)......................................... 65 1511.3 km (7 mi)........................................ 100 2512.9 km (8 mi)........................................ 150 3514.5 km (9 mi)........................................ 215 5016.1 km (10 mi)....................................... 295 7017.7 km (11 mi)....................................... 400 10019.3 km (12 mi)....................................... 530 13020.9 km (13 mi)....................................... 685 17022.5 km (14 mi)....................................... 870 21524.1 km (15 mi)....................................... 1000 27025.7 km (16 mi)....................................... 1000 41527.4 km (17 mi)....................................... 1000 50529.0 km (18 mi)....................................... 1000 61030.6 km (19 mi)....................................... 1000 73032.2 km (20 mi)....................................... 1000 86533.8 km (21 mi)....................................... 1000 1000------------------------------------------------------------------------
§ 22.1025 Permissible communications.
Offshore central stations must communicate only with subscriber stations (fixed, temporary-fixed, mobile and airborne). Offshore subscriber stations must normally communicate only with and through offshore central stations. Stations in the Offshore Radiotelephone Service may communicate through relay stations authorized in this service. § 22.1031 Temporary fixed stations.
The FCC may, upon proper application therefor, authorize the construction and operation of temporary fixed stations in the Offshore Radiotelephone service to be used only when the service of permanent fixed stations is disrupted by storms or emergencies or is otherwise unavailable.
(a) Six month limitation. If it is necessary for a temporary fixed station to remain at the same location for more than six months, the licensee of that station must apply for authorization to operate the station at the specific location at least 30 days before the end of the six month period.
(b) International communications. Communications between the United States and Mexico must not be carried using a temporary fixed station without prior authorization from the FCC. Licensees desiring to carry such communications should apply sufficiently in advance to allow for the time necessary to coordinate with Canada or Mexico. § 22.1035 Construction period.
The construction period (see §22.142) for offshore stations is 18 months. § 22.1037 Application requirements for offshore stations.
Applications for new Offshore Radiotelephone Service stations must contain an exhibit showing that:
(a) The applicant has notified all licensees of offshore stations located within 321.8 kilometers (200 miles) of the proposed offshore station, by providing the following data, at least 30 days before filing the application:
(1) The name, business address, channel coordinator, and telephone number of the applicant;
(2) The location and geographical coordinates of the proposed station;
(3) The channel and type of emission;
(4) The height and type of antenna;
(5) The bearing of the main lobe of the antenna; and,
(6) The effective radiated power.
(b) The proposed station will not interfere with the primary ORS channels by compliance with the following separations:
(1) Co-channel to a distance of 241.4 kilometers (150 miles).
(2) If interstitial channels are used, adjacent channels (±12.5 kHz) to a distance of 80.5 kilometers (50 miles).
(3) Third order intermodulation channels (±12.5 kHz) to a distance of 32.2 kilometers (20 miles).
(4) If the proposed transmitting antenna site is located west of longitude W.93°40', and within 32.2 kilometers (20 miles) of the shoreline, and proposed use of the channels listed in §22.1007(b), no third-order intermodulation interference would be caused to any base or mobile station using the channels between 488 and 494 MHz.
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