Federal regulations · Through 2026-08-25 · Newer source version available

47 CFR 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
488.025 491.025 488.225 491.225
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

Where this section sits in the code

Title 47—Telecommunication
CHAPTER I—FEDERAL COMMUNICATIONS COMMISSION
SUBCHAPTER B—COMMON CARRIER SERVICES
PART 22—PUBLIC MOBILE SERVICES
Subpart I—Offshore Radiotelephone Service

(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.

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.

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

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

Collected 2026-08-27T02:26:28Z. Source file · JSON

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