Sec.  80.374   Provisions for frequencies in the 4000–4063 and the 8100–8195 kHz
bands shared with the fixed service.

   Coast station assignments in the 4000–4063 kHz band deviate from
   international provisions. Coast station assignments in the 4000–4063 kHz
   band are permitted provided that such stations must not cause interference
   to, and must accept interference from, stations operated by other countries
   in accordance with the Radio Regulations.

   (a) Frequencies in the 4000–4063 kHz band. (1) The frequencies in the
   4000–4063 kHz bands are available to ship and public coast stations for:

   (i) Supplementary ship-to-shore duplex operations with coast stations
   assigned the frequencies described in  Sec. 80.371(b) of this part;

   (ii) Intership simplex operations and cross-band operations;

   (iii) Ship-to-shore or shore-to-ship simplex operations; or

   (iv) Duplex operations with coast stations assigned in the band 4438–4650
   kHz, as described in  Sec. 80.373(d) of this part.

   (2) The following table describes the channelization of carrier frequencies
   in the 4000–4063 kHz band.

                        Carrier Frequencies (kHz)



        4000                    4015          4030          4045
        4003                    4018          4033          4048
        4006                    4021          4036          4051
        4009                    4024          4039          4054
        4012                    4027          4042          4057


   (b) Frequencies in the 8100–8195 kHz band. (1) The frequencies in the
   8100–8195 kHz bands are available to ship and public coast stations for:

   (i) Supplementary ship-to-shore duplex operations with coast stations
   assigned the frequencies described in  Sec. 80.371(b) of this part;

   (ii) Intership simplex operations and cross-band operations; or

   (iii) Ship-to-shore or shore-to-ship simplex operations.

   (2) The following table describes the channelization of carrier frequencies
   in the 8100–8195 kHz band.

                        Carrier Frequencies (kHz)



          8101                        8137               8167
          8104                        8140               8170
          8107                        8143               8173
          8110                        8146               8176
          8116                        8149               8179
          8119                        8152               8182
          8122                        8155               8185
          8125                        8158               8188
          8131                        8161               8191
          8134                        8164       .................


   [ 56 FR 9896 , Mar. 8, 1991, as amended at  65 FR 77826 , Dec. 13, 2000;  68 FR 46970 , Aug. 7, 2003]

Radiodetermination