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amateurradio:international_distress

International distress frequency

Current frequencies

International distress frequencies, currently in use are:

  • 2182 kHz for medium range maritime voice use. The US Coast Guard has said “beginning August 1st, 2013 the Coast Guard would no longer monitor 2182 kHz”,[4] as have many other coast guard services.
  • Several HF maritime voice frequencies exist for long-distance distress calls:[5]
    • 4.125 MHz
    • 6.215 MHz
    • 8.291 MHz
    • 12.290 MHz
    • 16.420 MHz
  • 121.5 MHz is the civilian aircraft emergency frequency or International Air Distress frequency. It is used by civilian distress radiobeacons; however, the Cospas-Sarsat system no longer monitors the frequency.
  • 243 MHz for NATO military aircraft emergency frequencies
  • Marine VHF radio Channel 16 (156.8 MHz) for short range maritime use
  • 406 MHz to 406.1 MHz is used by the Cospas-Sarsat international satellite-based search and rescue (SAR) distress alert detection and information distribution system
  • 462.675 MHz is a UHF mobile distress and road information calling frequency allocated to the General Mobile Radio Service and used throughout Alaska and Canada for emergency communications; formerly called Orange Dot in the 1960s, “GMRS 675” or Channel 6 on mobile radios today. Its bandwidth can vary between 12.5, 25 and 50 kHz, and is also allocated to Ch. 20 on 22-channel FRS/GMRS “blister pack” radios. It can have a repeater input frequency of 467.675 MHz, and a tone squelch of 141.3 Hz.

Digital selective calling frequencies

Several maritime frequencies are used for digital selective calling (DSC), and they are also monitored for DSC distress signals:

  • 2.1875 MHz
  • 4.2075 MHz
  • 6.312 MHz
  • 8.4145 MHz
  • 12.577 MHz
  • 16.8045 MHz
  • 156.525 MHz, Marine VHF radio Channel 70

Amateur radio frequencies

  • Emergency Centre of Activity (ECOA) frequencies informally established by the International Amateur Radio Union regional organizations (frequencies shown in kHz):
Region 1
Europe, Africa
Region 2
The Americas
Region 3
Asia
3760 3750 or 3985 3600
7110 7060, 7240 or 7275 7110
14300 14300 14300
18160 18160 18160
21360 21360 21360
  • Emergency/Disaster Relief Interoperation Voice Channels of the amateur radio Global ALE High Frequency Network:
    • 3791.0 kHz USB
    • 7185.5 kHz USB
    • 10145.5 kHz USB
    • 14346.0 kHz USB
    • 18117.5 kHz USB
    • 21432.5 kHz USB
    • 24932.0 kHz USB
    • 28312.5 kHz USB
  • Citizens band (CB) radio (not available in all countries)
    • Emergency channels 9 (27.065 MHz AM) and 19 (27.185 MHz AM)
amateurradio/international_distress.txt · Last modified: 2017/10/30 09:34 by tplecko