---
kind: "section"
citation: "47 C.F.R. § 80.207"
title: "47"
number: "80.207"
heading: "Classes of emission."
url: "https://uscodex.org/cfr/47/80.207"
---

# §80.207. Classes of emission.

- (a) Authorization to use radiotelephone and radiotelegraph emissions by ship and coast stations includes the use of digital selective calling and selective calling techniques in accordance with [§ 80.225](/cfr/47/80.225.md).
- (b) In radiotelegraphy communications employing a modulated carrier the carrier must be keyed and modulated by an audio frequency.
- (c) Authorization to use single sideband emission is limited to emitting a carrier;
  - (1) For full carrier transmitters at a power level between 3 and 6 dB below peak envelope power;
  - (2) For suppressed carrier transmitters at a power level at least 40 dB below peak envelope power; and
  - (3) **For reduced or variable level carrier—**
    - (i) **In the 1600-4000 kHz band—**
      - (A) For coast station transmitters 18±2 dB below peak envelope power;
      - (B) For ship station transmitters installed before January 2, 1982, 16±2 dB below peak envelope power; and
      - (C) **For ship station transmitters installed after January 1, 1982, 18±2 dB below peak envelope power.**
    - (ii) **In the 4000-27500 kHz band—**
      - (A) For coast station transmitters 18±2 dB below peak envelope power;
      - (B) For ship station transmitters installed before January 2, 1978, 16±2 dB below peak envelope power; and
      - (C) **For ship station transmitters installed after January 1, 1978, 18±2 dB below peak envelope power.**
- (d) **The authorized classes of emission are as follows—**

## Notes

### Amendments

[51 FR 31213, Sept. 2, 1986]

### 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

[51 FR 31213, Sept. 2, 1986]