§  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

   [ 59 FR 59507 , Nov. 17, 1994;  60 FR 9891 , Feb. 22, 1995]