Collapse to view only § 22.1015 - Repeater operation.

§ 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 488.025491.025488.225491.225 488.050491.050488.250491.250 488.075491.075488.275491.275 488.100491.100488.300491.300 488.125491.125488.325491.325 488.150491.150488.350491.350 488.175491.175488.375491.375 488.200491.200488.400491.400

(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:

Central Subscriber Central Subscriber 488.425491.425488.575491.575 488.450491.450488.600491.600 488.475491.475488.625491.625 488.500491.500488.650491.650 488.525491.525488.675491.675 488.550491.550488.700491.700

(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.

Central Subscriber Central Subscriber 488.725491.725488.775491.775 488.750491.750488.800491.800

(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.

Central Subscriber Central Subscriber 488.825491.825488.875491.875 488.850491.850488.900491.900

(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.

Central Subscriber 488.950491.950

(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.

Central Subscriber Central Subscriber 489.000492.000489.200492.200 489.025492.025489.225492.225 489.050492.050489.250492.250 489.075492.075489.275492.275 489.100492.100489.300492.300 489.125492.125489.325492.325 489.150492.150489.350492.350 489.175492.175489.375492.375

(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:

Central Subscriber Central Subscriber 489.400492.400489.725492.725 489.425492.425489.750492.750 489.450492.450489.775492.775 489.475492.475489.800492.800 489.500492.500489.825492.825 489.525492.525489.850492.850 489.550492.550489.875492.875 489.575492.575489.900492.900 489.600492.600489.925492.925 489.625492.625489.950492.950 489.650492.650489.975492.975 489.675492.675490.000493.000 489.700492.700

(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:

Central Subscriber Central Subscriber 485.025482.025486.025483.025 485.050482.050486.050483.050 485.075482.075486.075483.075 485.100482.100486.100483.100 485.125482.125486.125483.125 485.150482.150485.150483.150 485.175482.175486.175483.175 485.200482.200486.200483.200 485.225482.225486.225483.225 485.250482.250486.250483.250 485.275482.275486.275483.275 485.300482.300486.300483.300 485.325482.325486.325483.325 485.350482.350486.350483.350 485.375482.375486.375483.375 485.400482.400486.400483.400 485.425482.425486.425483.425 485.450482.450486.450483.450 485.475482.475486.475483.475 485.500482.500486.500483.500 485.525482.525486.525483.525 485.550482.550484.550483.550 485.575482.575486.575483.575 485.600482.600486.600483.600 485.625482.625486.625483.625 485.650482.650486.650483.650 485.675482.675486.675483.675 485.700482.700486.700483.700 485.725482.725486.725483.725 485.750482.750486.750483.750 485.775482.775486.775483.775 485.800482.800486.800483.800 485.825482.825486.825483.825 485.850482.850486.850483.850 485.875482.875486.875483.875 485.900482.900486.900483.900 485.925482.925486.925483.925 485.950482.950486.950483.950 485.975482.975486.975483.975 486.000483.000487.050480.050
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.

Central Subscriber 476.950479.950

(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:

476.025479.025 476.050479.050 476.075479.075 476.100479.100 476.125479.125 476.150479.150 476.175479.175 476.200479.200 476.225479.225 476.250479.250 476.275479.275 476.300479.300 476.325479.325 476.350479.350 476.375479.375 476.400479.400 476.425479.425 476.450479.450 476.475479.475 476.500479.500 476.525479.525 476.550479.550 476.575479.575 476.600479.600 476.625479.625 476.650479.650 476.675479.675 476.700479.700 476.725479.725 476.750479.750 476.775479.775 476.800479.800 476.825479.825 476.850479.850 476.875479.875 476.900479.900 477.000480.000 477.025480.025 477.075480.075 477.100480.100 477.125480.125 477.150480.150 477.175480.175 477.200480.200 477.225480.225 477.250480.250 477.275480.275 477.300480.300 477.325480.325 477.350480.350 477.375480.375 477.400480.400 477.425480.425 477.450480.450 477.475480.475 477.500480.500 477.525480.525 477.550480.550 477.575480.575 477.600480.600 477.625480.625 477.650480.650 477.675480.675 477.700480.700 477.725480.725 477.750480.750 477.775480.775 477.800480.800 477.825480.825 477.850480.850 477.875480.875 477.900480.900 477.925480.925 477.950480.950 477.975480.975
[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.

Table I-1—Maximum ERP (Watts)

Distance 30 meters (100 feet) 45 meters (150 feet) 61 meters (200 feet) 338 km (210 mi)100010001000 330 km (205 mi)1000900800 2 km (200 mi)800710630 314 km (195 mi)590520450 306 km (190 mi)450400330 298 km (185 mi)320280240 290 km (180 mi)250210175 282 km (175 mi)180150130 274 km (170 mi)175110100 266 km (165 mi)958070 258 km (160 mi)655550 249 km (155 mi)504035 241 km (150 mi)353025

§ 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.

Table I-2—Maximum ERP (Watts)

Distance from the 4.8 km (3 mi) limit 30 meters (100 feet) 61 meters (200 feet) 6.4 km (4 mi)256 8.0 km (5 mi)4010 9.7 km (6 mi)6515 11.3 km (7 mi)10025 12.9 km (8 mi)15035 14.5 km (9 mi)21550 16.1 km (10 mi)29570 17.7 km (11 mi)400100 19.3 km (12 mi)530130 20.9 km (13 mi)685170 22.5 km (14 mi)870215 24.1 km (15 mi)1000270 25.7 km (16 mi)1000415 27.4 km (17 mi)1000505 29.0 km (18 mi)1000610 30.6 km (19 mi)1000730 32.2 km (20 mi)1000865 33.8 km (21 mi)10001000

§ 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.