{"data":{"id":"us/47-cfr-22.1007","jurisdiction":"us","citation":"47 CFR 22.1007","heading":"Channels for offshore radiotelephone systems.","body":"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.\n(a) Zone A—Southern Louisiana. The geographical area in Zone A is bounded as follows:\nFrom 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.\n(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:\nCentral Subscriber Central Subscriber\n488.025 491.025 488.225 491.225\n488.050 491.050 488.250 491.250\n488.075 491.075 488.275 491.275\n488.100 491.100 488.300 491.300\n488.125 491.125 488.325 491.325\n488.150 491.150 488.350 491.350\n488.175 491.175 488.375 491.375\n488.200 491.200 488.400 491.400\n(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:\nCentral Subscriber Central Subscriber\n488.425 491.425 488.575 491.575\n488.450 491.450 488.600 491.600\n488.475 491.475 488.625 491.625\n488.500 491.500 488.650 491.650\n488.525 491.525 488.675 491.675\n488.550 491.550 488.700 491.700\n(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.\nCentral Subscriber Central Subscriber\n488.725 491.725 488.775 491.775\n488.750 491.750 488.800 491.800\n(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.\nCentral Subscriber Central Subscriber\n488.825 491.825 488.875 491.875\n488.850 491.850 488.900 491.900\n(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.\nCentral Subscriber\n488.950 491.950\n(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.\nCentral Subscriber Central Subscriber\n489.000 492.000 489.200 492.200\n489.025 492.025 489.225 492.225\n489.050 492.050 489.250 492.250\n489.075 492.075 489.275 492.275\n489.100 492.100 489.300 492.300\n489.125 492.125 489.325 492.325\n489.150 492.150 489.350 492.350\n489.175 492.175 489.375 492.375\n(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:\nCentral Subscriber Central Subscriber\n489.400 492.400 489.725 492.725\n489.425 492.425 489.750 492.750\n489.450 492.450 489.775 492.775\n489.475 492.475 489.800 492.800\n489.500 492.500 489.825 492.825\n489.525 492.525 489.850 492.850\n489.550 492.550 489.875 492.875\n489.575 492.575 489.900 492.900\n489.600 492.600 489.925 492.925\n489.625 492.625 489.950 492.950\n489.650 492.650 489.975 492.975\n489.675 492.675 490.000 493.000\n489.700 492.700\n(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:\n(i) Offshore stations transmitting on interstitial channels must be located east of W.92° longitude.\n(ii) Operations on interstitial channels are considered to be secondary to operations on channels with the listed center frequencies.\n(iii) Offshore stations operating on interstitial channels must be used only for voice grade general communications or to provide for private line service.\nNote to paragraph (a) of § 22.1007:\nThese channels are contained in UHF TV Channel 17.\n(b) Zone B—Southern Louisiana—Texas. (1) The geographical area in Zone B is bounded as follows:\nFrom 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.\n(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:\nCentral Subscriber Central Subscriber\n485.025 482.025 486.025 483.025\n485.050 482.050 486.050 483.050\n485.075 482.075 486.075 483.075\n485.100 482.100 486.100 483.100\n485.125 482.125 486.125 483.125\n485.150 482.150 485.150 483.150\n485.175 482.175 486.175 483.175\n485.200 482.200 486.200 483.200\n485.225 482.225 486.225 483.225\n485.250 482.250 486.250 483.250\n485.275 482.275 486.275 483.275\n485.300 482.300 486.300 483.300\n485.325 482.325 486.325 483.325\n485.350 482.350 486.350 483.350\n485.375 482.375 486.375 483.375\n485.400 482.400 486.400 483.400\n485.425 482.425 486.425 483.425\n485.450 482.450 486.450 483.450\n485.475 482.475 486.475 483.475\n485.500 482.500 486.500 483.500\n485.525 482.525 486.525 483.525\n485.550 482.550 484.550 483.550\n485.575 482.575 486.575 483.575\n485.600 482.600 486.600 483.600\n485.625 482.625 486.625 483.625\n485.650 482.650 486.650 483.650\n485.675 482.675 486.675 483.675\n485.700 482.700 486.700 483.700\n485.725 482.725 486.725 483.725\n485.750 482.750 486.750 483.750\n485.775 482.775 486.775 483.775\n485.800 482.800 486.800 483.800\n485.825 482.825 486.825 483.825\n485.850 482.850 486.850 483.850\n485.875 482.875 486.875 483.875\n485.900 482.900 486.900 483.900\n485.925 482.925 486.925 483.925\n485.950 482.950 486.950 483.950\n485.975 482.975 486.975 483.975\n486.000 483.000 487.050 480.050\nNote to paragraph (b) of § 22.1007:\nThese channels are contained in UHF TV Channel 16.\n(c) Zone C—Southern Texas. The geographical area in Zone C is bounded as follows:\nLongitude 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.\n(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.\nCentral Subscriber\n476.950 479.950\n(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:\n476.025 479.025\n476.050 479.050\n476.075 479.075\n476.100 479.100\n476.125 479.125\n476.150 479.150\n476.175 479.175\n476.200 479.200\n476.225 479.225\n476.250 479.250\n476.275 479.275\n476.300 479.300\n476.325 479.325\n476.350 479.350\n476.375 479.375\n476.400 479.400\n476.425 479.425\n476.450 479.450\n476.475 479.475\n476.500 479.500\n476.525 479.525\n476.550 479.550\n476.575 479.575\n476.600 479.600\n476.625 479.625\n476.650 479.650\n476.675 479.675\n476.700 479.700\n476.725 479.725\n476.750 479.750\n476.775 479.775\n476.800 479.800\n476.825 479.825\n476.850 479.850\n476.875 479.875\n476.900 479.900\n477.000 480.000\n477.025 480.025\n477.075 480.075\n477.100 480.100\n477.125 480.125\n477.150 480.150\n477.175 480.175\n477.200 480.200\n477.225 480.225\n477.250 480.250\n477.275 480.275\n477.300 480.300\n477.325 480.325\n477.350 480.350\n477.375 480.375\n477.400 480.400\n477.425 480.425\n477.450 480.450\n477.475 480.475\n477.500 480.500\n477.525 480.525\n477.550 480.550\n477.575 480.575\n477.600 480.600\n477.625 480.625\n477.650 480.650\n477.675 480.675\n477.700 480.700\n477.725 480.725\n477.750 480.750\n477.775 480.775\n477.800 480.800\n477.825 480.825\n477.850 480.850\n477.875 480.875\n477.900 480.900\n477.925 480.925\n477.950 480.950\n477.975 480.975","path":["Title 47—Telecommunication","CHAPTER I—FEDERAL COMMUNICATIONS COMMISSION","SUBCHAPTER B—COMMON CARRIER SERVICES","PART 22—PUBLIC MOBILE SERVICES","Subpart I—Offshore Radiotelephone 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":"c1c1168fcb532dac70fa930140052633bf66a28d4d98d868bfb03fec3812acac","source_id":"us-cfr","stale":true,"prev":"us/47-cfr-22.1005","next":"us/47-cfr-22.1009"},"notice":"GroundRules: Original legal text. Not legal advice."}