#### § 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](/on/2024-09-20/title-47/section-80.225).

(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:

| Types of stations | Classes of emission |
| --- | --- |
| **Ship Stations**1 | |
| Radiotelegraphy: | |
| 100-160 kHz | A1A. |
| 405-525 kHz | A1A, J2A. |
| 1615-27500 kHz: | |
| Manual15 16 17 | A1A, J2A, J2B, J2D. |
| DSC6 | F1B, J2B. |
| NB-DP14 16 | F1B, J2B, J2D. |
| Facsimile | F1C, F3C, J2C, J3C. |
| 156-162 MHz2 | F1B, F2B, F2C, F3C, F1D, F2D. |
| DSC | G2B. |
| 216-220 MHz3 | F1B, F2B, F2C, F3C. |
| 1626.5-1646.5 MHz | (4). |
| Radiotelephony: | |
| 1615-27500 kHz16 | H3E, J2D, J3E, R3E. |
| 27.5-470 MHz6 | G3D, G3E. |
| 1626.5-1646.5 MHz | (4). |
| Radiodetermination: | |
| 285-325 kHz7 | A1A, A2A. |
| 405-525 kHz (Direction Finding)8 | A3N, H3N, J3N, NON. |
| 154-459 MHz:12 | A1D, A2D, F1D, F2D, G1D, G2D. |
| 2.4-9.5 GHz | PON. |
| **Land Stations**1 | |
| Radiotelegraphy: | |
| 100-160 kHz | A1A. |
| 405-525 kHz | A1A, J2A. |
| 1605-2850 kHz: | |
| Manual | A1A, J2A. |
| Facsimile | F1C, F3C, J2C, J3C. |
| Alaska-Fixed | A1A, J2A. |
| 4000-27500 kHz: | |
| Manual16 | A1A, J2A, J2B, J2D. |
| DSC18 | F1B, J2B. |
| NB-DP14 18 | F1,B J2B, J2D. |
| Facsimile | F1C, F3C, J2C, J3C. |
| Alaska-Fixed17 18 | A1A, A2A, F1B, F2B, J2B, J2D. |
| 72-76 MHz | A1A, A2A, F1B, F2B. |
| 156-162 MHz2 20 | F1B, F2B, F2C, F3C, F1D, F2D. |
| DSC | G2B. |
| 216-220 MHz3 | F1B, F2B, F2C, F3C. |
| Radiotelephony: | |
| 1615-27500 kHz18 19 | H3E, J3E, R3E. |
| 72-76 MHz | A3E, F3E, G3E. |
| 156-470 MHz | G3E. |
| Radiodetermination: | |
| 2.4-9.6 GHz | PON. |
| Distress, Urgency and Safety8 9 | |
| 2182 kHz10 11 | A2B, A3B, H2B, H3E, J2B, J3E. |
| 121.500 MHz | A3E, AEX, N0N. |
| 123.100 MHz | A3E. |
| 156.750 and 156.800 MHz13 | G3E, G3N. |
| 243.000 MHz | A3E, A3X, N0N. |
| 406.0-406.1 MHz | G1D. |
| | |
| --- | --- |
| 1 Excludes distress, EPIRBs, survival craft, and automatic link establishment. | |
| 2 Frequencies used for public correspondence and in Alaska 156.425 MHz. *See* [§§ 80.371(c)](/on/2024-09-20/title-47/section-80.371#p-80.371(c)), [80.373(f)](/on/2024-09-20/title-47/section-80.373#p-80.373(f)) and [80.385(b)](/on/2024-09-20/title-47/section-80.385#p-80.385(b)). Transmitters approved before January 1, 1994, for G3E emissions will be authorized indefinitely for F2C, F3C, F1D and F2D emissions. Transmitters approved on or after January 1, 1994, will be authorized for F2C, F3C, F1D or F2D emissions only if they are approved specifically for each emission designator. | |
| 3 Frequencies used in the Automated Maritime Telecommunications System (AMTS). *See* [§ 80.385(b)](/on/2024-09-20/title-47/section-80.385#p-80.385(b)). | |
| 4 Types of emission are determined by the INMARSAT Organization. | |
| 5 [Reserved] | |
| 6 G3D emission must be used only by one-board stations for maneuvering or navigation. | |
| 7 Frequencies used for cable repair operations. *See* [§ 80.375(b)](/on/2024-09-20/title-47/section-80.375#p-80.375(b)). | |
| 8 For direction finding requirements see [§ 80.375](/on/2024-09-20/title-47/section-80.375). | |
| 9 Includes distress emissions used by ship, coast, EPIRBs and survival craft stations. | |
| 10 On 2182 kHz A1B, A2B, H2B and J2B emissions indicate transmission of the auto alarm signals. | |
| 11 Ships on domestic voyages must use J3E emission only. | |
| 12 For frequencies 154.585 MHz, 159.480 MHz, 160.725 MHz, 160.785 MHz, 454.000 MHz and 459.000 MHz, authorized for offshore radiolocation and related telecommand operations. | |
| 13 [Reserved] | |
| 14 NB-DP operations which are not in accordance with ITU-R Recommendations M.625 or M.476 are permitted to utilize any modulation, so long as emissions are within the limits set forth in [§ 80.211(f)](/on/2024-09-20/title-47/section-80.211#p-80.211(f)). | |
| 15 J2B is permitted only on 2000-27500 kHz. | |
| 16 J2D is permitted only on 2000-27500 kHz, and ship stations employing J2D emissions shall at no time use a peak envelope power in excess of 1.5 kW per channel. | |
| 17 J2B and J2D are permitted provided they do not cause harmful interference to A1A. | |
| 18 Coast stations employing J2D emissions shall at no time use a peak envelope power in excess of 10 kW per channel. | |
| 19 J2D is permitted only on 2000-27500 kHz. | |
| 20 If a station uses another type of digital emission, it must comply with the emission mask requirements of [§ 90.210 of this chapter](/on/2024-09-20/title-47/section-90.210), except that Automatic Identification System (AIS) transmissions do not have to comply with the emission mask requirements of [§ 90.210 of this chapter](/on/2024-09-20/title-47/section-90.210). | |

[[51 FR 31213](https://www.federalregister.gov/citation/51-FR-31213), Sept. 2, 1986]

###### Editorial Note

#### Editorial Note:

For Federal Register citations affecting [§ 80.207](/on/2024-09-20/title-47/section-80.207), see the List of CFR Sections Affected, which appears in the Finding Aids section of the printed volume and at *[www.govinfo.gov](http://www.govinfo.gov).*