---
kind: "section"
citation: "47 C.F.R. § 80.374"
title: "47"
number: "80.374"
heading: "Provisions for frequencies in the 4000-4063 and the 8100-8195 kHz bands shared with the fixed service."
url: "https://uscodex.org/cfr/47/80.374"
---

# §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 [§ 80.371(b)](/cfr/47/80.371.md?p=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 [§ 80.373(d)](/cfr/47/80.373.md?p=d) of this part.
  - (2) **The following table describes the channelization of carrier frequencies in the 4000-4063 kHz band.**
- (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 [§ 80.371(b)](/cfr/47/80.371.md?p=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.**

## Notes

### Amendments

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

### Authority

Authority: 47 U.S.C. 151-155, 301-609; 3 U.S.T. 3450, 3 U.S.T. 4726, 12 U.S.T. 2377.

### Source

Source: 51 FR 31213, Sept. 2, 1986, unless otherwise noted.

### Amendments

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