Sec.  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  Sec. 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:                  
   Manual^15,^16,^17                 A1A, J2A, J2B, J2D.
   DSC^6                             F1B, J2B.
   NB–DP^14,^16                      F1B, J2B, J2D.
   Facsimile                         F1C, F3C, J2C, J3C.
   156–162 MHz^2                     F1B, F2B, F2C, F3C, F1D, F2D.
   DSC                               G2B.
   216–220 MHz^3                     F1B, F2B, F2C, F3C.
   1626.5–1646.5 MHz                 (^4).
   Radiotelephony:                  
   1615–27500 kHz^16                 H3E, J2D, J3E, R3E.
   27.5–470 MHz^6                    G3D, G3E.
   1626.5–1646.5 MHz                 (^4).
   Radiodetermination:              
   285–325 kHz^7                     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:                  
   Manual^16                         A1A, J2A, J2B, J2D.
   DSC^18                            F1B, J2B.
   NB–DP^14,^18                      F1,B J2B, J2D.
   Facsimile                         F1C, F3C, J2C, J3C.
   Alaska-Fixed^17,^18               A1A, A2A, F1B, F2B, J2B, J2D.
   72–76 MHz                         A1A, A2A, F1B, F2B.
   156–162 MHz^2,^20                 F1B, F2B, F2C, F3C, F1D, F2D.
   DSC                               G2B.
   216–220 MHz^3                     F1B, F2B, F2C, F3C.
   Radiotelephony:                  
   1615–27500 kHz^18,^19             H3E, J3E, R3E.
   72–76 MHz                         A3E, F3E, G3E.
   156–470 MHz                       G3E.
   Radiodetermination:              
   2.4–9.6 GHz                       PON.
   Distress, Urgency and Safety^8,^9
   2182 kHz^10,^11                   A2B, A3B, H2B, H3E, J2B, J3E.
   121.500 MHz                       A3E, AEX, N0N.
   123.100 MHz                       A3E.
   156.750 and 156.800 MHz^13        G3E, G3N.
   243.000 MHz                       A3E, A3X, N0N.
   406.0–406.1 MHz                   G1D.

   ^1Excludes  distress,  EPIRBs,  survival  craft,  and  automatic  link
   establishment.

   ^2Frequencies used for public correspondence and in Alaska 156.425 MHz. See
    Sec.  Sec. 80.371(c), 80.373(f) and 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.

   ^3Frequencies used in the Automated Maritime Telecommunications System
   (AMTS). See  Sec. 80.385(b).

   ^4Types of emission are determined by the INMARSAT Organization.

   ^5[Reserved]

   ^6G3D emission must be used only by one-board stations for maneuvering or
   navigation.

   ^7Frequencies used for cable repair operations. See  Sec. 80.375(b).

   ^8For direction finding requirements see  Sec. 80.375.

   ^9Includes distress emissions used by ship, coast, EPIRBs and survival craft
   stations.

   ^10On 2182 kHz A1B, A2B, H2B and J2B emissions indicate transmission of the
   auto alarm signals.

   ^11Ships on domestic voyages must use J3E emission only.

   ^12For 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.

   ^13Class C EPIRB stations may not be used after February 1, 1999.

   ^14NB–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  Sec. 80.211(f).

   ^15J2B is permitted only on 2000–27500 kHz.

   ^16J2D 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.

   ^17J2B and J2D are permitted provided they do not cause harmful interference
   to A1A.

   ^18Coast  stations employing J2D emissions shall at no time use a peak
   envelope power in excess of 10 kW per channel.

   ^19J2D is permitted only on 2000–27500 kHz.

   ^20If a station uses another type of digital emission, it must comply with
   the emission mask requirements of  Sec. 90.210 of this chapter, except that
   Automatic Identification System (AIS) transmissions do not have to comply
   with the emission mask requirements of  Sec. 90.210 of this chapter.

   [ 51 FR 31213 , Sept. 2, 1986;  51 FR 34984 , Oct. 1, 1986; as amended at  52 FR 7418 , Mar. 11, 1987;  52 FR 35244 , Sept. 18, 1987;  53 FR 8905 , Mar. 18, 1988;
    53 FR 37308 , Sept. 26, 1988;  54 FR 40058 , Sept. 29, 1989;  54 FR 49993 , Dec.
   4, 1989;  56 FR 11516 , Mar. 19, 1991;  57 FR 43407 , Sept. 21, 1992;  58 FR 33344 , June 17, 1993;  62 FR 40305 , July 28, 1997;  63 FR 36606 , July 7, 1998;
    67 FR 48564 , July 25, 2002;  68 FR 46963 , Aug. 7, 2003;  69 FR 64672 , Nov. 8,
   2004;  73 FR 4481 , Jan. 25, 2008]