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 488.025 491.025 488.225 491.225 488.050 491.050 488.250 491.250 488.075 491.075 488.275 491.275 488.100 491.100 488.300 491.300 488.125 491.125 488.325 491.325 488.150 491.150 488.350 491.350 488.175 491.175 488.375 491.375 488.200 491.200 488.400 491.400 (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 488.425 491.425 488.575 491.575 488.450 491.450 488.600 491.600 488.475 491.475 488.625 491.625 488.500 491.500 488.650 491.650 488.525 491.525 488.675 491.675 488.550 491.550 488.700 491.700 (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 488.725 491.725 488.775 491.775 488.750 491.750 488.800 491.800 (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 488.825 491.825 488.875 491.875 488.850 491.850 488.900 491.900 (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 488.950 491.950 (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 489.000 492.000 489.200 492.200 489.025 492.025 489.225 492.225 489.050 492.050 489.250 492.250 489.075 492.075 489.275 492.275 489.100 492.100 489.300 492.300 489.125 492.125 489.325 492.325 489.150 492.150 489.350 492.350 489.175 492.175 489.375 492.375 (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 489.400 492.400 489.725 492.725 489.425 492.425 489.750 492.750 489.450 492.450 489.775 492.775 489.475 492.475 489.800 492.800 489.500 492.500 489.825 492.825 489.525 492.525 489.850 492.850 489.550 492.550 489.875 492.875 489.575 492.575 489.900 492.900 489.600 492.600 489.925 492.925 489.625 492.625 489.950 492.950 489.650 492.650 489.975 492.975 489.675 492.675 490.000 493.000 489.700 492.700 (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 485.025 482.025 486.025 483.025 485.050 482.050 486.050 483.050 485.075 482.075 486.075 483.075 485.100 482.100 486.100 483.100 485.125 482.125 486.125 483.125 485.150 482.150 485.150 483.150 485.175 482.175 486.175 483.175 485.200 482.200 486.200 483.200 485.225 482.225 486.225 483.225 485.250 482.250 486.250 483.250 485.275 482.275 486.275 483.275 485.300 482.300 486.300 483.300 485.325 482.325 486.325 483.325 485.350 482.350 486.350 483.350 485.375 482.375 486.375 483.375 485.400 482.400 486.400 483.400 485.425 482.425 486.425 483.425 485.450 482.450 486.450 483.450 485.475 482.475 486.475 483.475 485.500 482.500 486.500 483.500 485.525 482.525 486.525 483.525 485.550 482.550 484.550 483.550 485.575 482.575 486.575 483.575 485.600 482.600 486.600 483.600 485.625 482.625 486.625 483.625 485.650 482.650 486.650 483.650 485.675 482.675 486.675 483.675 485.700 482.700 486.700 483.700 485.725 482.725 486.725 483.725 485.750 482.750 486.750 483.750 485.775 482.775 486.775 483.775 485.800 482.800 486.800 483.800 485.825 482.825 486.825 483.825 485.850 482.850 486.850 483.850 485.875 482.875 486.875 483.875 485.900 482.900 486.900 483.900 485.925 482.925 486.925 483.925 485.950 482.950 486.950 483.950 485.975 482.975 486.975 483.975 486.000 483.000 487.050 480.050 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 476.950 479.950 (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: 476.025 479.025 476.050 479.050 476.075 479.075 476.100 479.100 476.125 479.125 476.150 479.150 476.175 479.175 476.200 479.200 476.225 479.225 476.250 479.250 476.275 479.275 476.300 479.300 476.325 479.325 476.350 479.350 476.375 479.375 476.400 479.400 476.425 479.425 476.450 479.450 476.475 479.475 476.500 479.500 476.525 479.525 476.550 479.550 476.575 479.575 476.600 479.600 476.625 479.625 476.650 479.650 476.675 479.675 476.700 479.700 476.725 479.725 476.750 479.750 476.775 479.775 476.800 479.800 476.825 479.825 476.850 479.850 476.875 479.875 476.900 479.900 477.000 480.000 477.025 480.025 477.075 480.075 477.100 480.100 477.125 480.125 477.150 480.150 477.175 480.175 477.200 480.200 477.225 480.225 477.250 480.250 477.275 480.275 477.300 480.300 477.325 480.325 477.350 480.350 477.375 480.375 477.400 480.400 477.425 480.425 477.450 480.450 477.475 480.475 477.500 480.500 477.525 480.525 477.550 480.550 477.575 480.575 477.600 480.600 477.625 480.625 477.650 480.650 477.675 480.675 477.700 480.700 477.725 480.725 477.750 480.750 477.775 480.775 477.800 480.800 477.825 480.825 477.850 480.850 477.875 480.875 477.900 480.900 477.925 480.925 477.950 480.950 477.975 480.975 [59 FR 59507, Nov. 17, 1994; 60 FR 9891, Feb. 22, 1995]