Sec.  80.1077   Frequencies.

   The following table describes the frequencies used in the Global Maritime
   Distress and Safety System:

   Alerting:
   406.0–406.1 EPIRBs 406.0–406.1 MHz (Earth-to-space).
   1544–1545 MHz (space-to-Earth).
   INMARSAT–E EPIRBs 1626.5–1645.5 MHz (Earth-to-space).
   INMARSAT  Ship  Earth Stations capable of voice and/or direct printing
   1626.5–1645.5 MHz (Earth-to-space).
   VHF DSC Ch. 70 156.525 MHz.^1
   MF/HF DSC^2,11 2187.5 kHz^3, 4207.5 kHz, 6312 kHz, 8414.5 kHz, 12577 kHz,
   and 16804.5 kHz.
   On-scene communications:
   VHF Ch.16 156.8 MHz.
   MF Radiotelephony 2182 kHz.
   NBDP 2174.5 kHz.
   Communications involving aircraft:
   On-scene, including search and rescue 156.8 MHz^4, 121.5 MHz^5, 123.1 MHz,
   156.3 MHz, 2182 kHz, 3023 kHz, 4125 kHz, and 5680 kHz.^6
   Locating signals:
   406–406.1 EPIRB Beacons 121.5 MHz.
   9 GHz radar transponders 9200–9500 MHz.
   Maritime safety information (MSI):
   International NAVTEX 518 kHz.^7
   Warnings 490 kHz, 4209.5 kHz.
   NBDP 4210 kHz, 6314 kHz, 8416.5 kHz, 12579 kHz, 16806.5 kHz, 19680.5 kHz,
   22376 kHz, 26100.5 kHz.
   Satellite 1530–1545 MHz.^10
   General distress and safety communications and calling:
   Satellite   1530–1544   MHz  (space-to-Earth)  and  1626.5–1645.5  MHz
   (Earth-to-space).^10
   Radiotelephony 2182 kHz, 4125 kHz, 6215 kHz, 8291 kHz, 12290 kHz, 16420 kHz,
   and 156.8 MHz.
   NBDP 2174.5 kHz, 4177.5 kHz, 6268 kHz, 8376.5 kHz, 12520 kHz, and 16695 kHz.
   DSC 2187.5 kHz, 4207.5 kHz, 6312 kHz, 8414.5 kHz, 12577 kHz, 16804.5 kHz,
   and 156.525 MHz.
   Survival craft:
   VHF radiotelephony 156.8 MHz and one other 156–174 MHz frequency
   9 GHz radar transponders 9200–9500 MHz.

   ^1Frequency 156.525 MHz can be used for ship-to-ship alerting and, if within
   sea area A1, for ship-to-shore alerting.

   ^2For ships equipped with MF/HF equipment, there is a watch requirement on
   2187.5 kHz, 8414.5 kHz, and one other frequency.

   ^3Frequency 2187.5 kHz can be used for ship-to-ship alerting and, if within
   sea area A2, for ship-to-shore alerting.

   ^4Frequency 156.8 MHz may also be used by aircraft for safety purposes only.

   ^5Frequency 121.5 MHz may be used by ships for aeronautical distress and
   urgency purposes.

   ^6The priority of use for ship-aircraft communications is 4125 kHz, then
   3023 kHz. Additionally, frequencies 123.1 MHz, 3023 kHz and 5680 kHz can be
   used by land stations engaged in coordinated search and rescue operations.

   ^7The international NAVTEX frequency 518 kHz is the primary frequency for
   receiving maritime safety information. The other frequencies are used only
   to augment the coverage or information provided on 518 kHz.

   ^8[Reserved]

   ^9[Reserved]

   ^10In addition to EPIRBs, 1544–1545 MHz can be used for narrowband distress
   and  safety  operations and 1645.5–1646.5 MHz can be used for relay of
   distress   alerts  between  satellites.  Feeder  links  for  satellite
   communications are assigned from the fixed satellite service, see 47 CFR
    Sec. 2.106.

   ^11Routine calling is not permitted on MF and HF DSC frequencies.

   [ 69 FR 64678 , Nov. 8, 2004]

Equipment Requirements for Ship Stations