Use of some distress frequencies is permitted for calling other stations to establish contact, whereupon the stations move to another frequency. Such channels are known as distress, safety and calling frequencies.[1]
Satellite processing from all 121.5 or 243 MHz locators has been discontinued. Since February 1, 2009, the U.S. Coast Guard only monitors distress signals from emergency position indicating radio beacons (EPIRBs) that broadcast using digital 406 MHz signals.[2] Digital 406 MHz models became the only ones approved for use in both commercial and recreational watercraft worldwide on January 1, 2007.[3]
Maritime Mobile Service 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] Many other MRCCs, for example most in Northern Europe, now only have MF capabilities and no HF.[5]
Several HF maritime voice frequencies exist for long-distance distress calls:[6]
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
Digital selective calling frequencies
Several maritime frequencies are used for digital selective calling (DSC), and they are also monitored for DSC distress signals:[6][7]
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
Search And Rescue frequencies
123.1 MHz: Aeronautical Auxiliary Frequency (International voice for coordinated SAR operations).
138.78 MHz— U.S. military voice SAR on-the-scene use. This frequency is also used for direction finding (DF).
155.160 MHz
172.5 MHz— U.S. Navy emergency sonobuoy communications and homing use. This frequency is monitored by all U.S. Navy ASW aircraft assigned to a SAR mission.
282.8 MHz— Joint/combined on-the-scene voice and DF frequency used throughout NATO
406 MHz / 406.1 MHz - Cospas-Sarsat international satellite-based search and rescue (SAR) distress alert detection and information distribution system
GMRS: 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; sometimes referred to as "Orange Dot" by some transceiver manufacturers who associated a frequency with a color-code for ease of channel coordination, until the creation of the Family Radio Service, in 1996, "GMRS 675" or Channel 6/20 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. After FCC deregulation of simplex FRS/GMRS radios, FRS users may transmit up to 2 watts on the GMRS emergency channel 20 (462.675 MHz) with 141.3 Hz CTCSS, or channel 20-22.
MURS: 151.940 MHz (only available in the United States)
FRS: FRS channel 1: 462.5625 MHz (carrier squelch, no tone or sub-channel), channel 3: 462.6125 MHz[16] and channel 20: 462.6750 MHz (141.3 Hz CTCSS - channel 20, code 22 or channel 20-22).
UHF CB (Australia): Emergency channels 5/35 (476.525/477.275 MHz).[17] Channel 5 is the designated simplex and repeater output emergency channel, while channel 35 is used as the repeater input frequency for duplex operation. UHF CB is only available in Australia and New Zealand.
^"USCG: Commercial Fishing Vessel Safety Program - 13th Coast Guard District - Guardians of the Pacific Northwest". www.uscg.mil.
^UK Hydrographic Office (2017). Volume 1 (NP281) - Maritime Radio Stations (Parts 1 & 2). UK: UK Hydrographic Office.
^ ab "HF Distress and Safety Watchkeeping Schedule". U.S. Coast Guard Navigation Center. U.S. Coast Guard. Retrieved Oct 12, 2011.
^"Recommendation M.541: Operational procedures for the use of digital selective-calling equipment in the maritime mobile service". International Telecommunication Union. 2015.
^(PDF). Archived from the original (PDF) on 2018-09-20.
^(PDF). Archived from the original (PDF) on 2018-11-14.
^Ulli, DK4VW -. "HF - International Amateur Radio Union - Region 1". iaru-r1.org.
^(PDF). Archived from the original (PDF) on 2013-04-08. Retrieved 2013-05-06.{{cite web}}: CS1 maint: archived copy as title (link)
^(PDF). Archived from the original (PDF) on 2013-04-08. Retrieved 2013-05-06.{{cite web}}: CS1 maint: archived copy as title (link)
^INC, copyright 2007 HFPACK. "HFLINK - HF Automatic Link Establishment HF ALE HF Network Ham Radio Amateur Radio HF Emergency Disaster Relief Communications". hflink.com.
^"SHTF Survialist Radio Frequency Lists". 29 June 2013.
international, distress, frequency, international, distress, frequency, radio, frequency, that, designated, emergency, communication, international, agreement, contents, history, maritime, mobile, service, frequencies, digital, selective, calling, frequencies,. An international distress frequency is a radio frequency that is designated for emergency communication by international agreement Contents 1 History 2 Maritime Mobile Service frequencies 2 1 Digital selective calling frequencies 3 Aeronautical frequencies 4 Search And Rescue frequencies 5 Amateur radio frequencies 5 1 VHF UHF calling frequencies can also be used to make emergency calls 5 2 MF and HF frequencies 6 Other frequencies 7 See also 8 ReferencesHistory EditFor much of the 20th century 500 kHz was the primary international distress frequency Its use has been phased out in favor of the Global Maritime Distress Safety System Use of some distress frequencies is permitted for calling other stations to establish contact whereupon the stations move to another frequency Such channels are known as distress safety and calling frequencies 1 Satellite processing from all 121 5 or 243 MHz locators has been discontinued Since February 1 2009 the U S Coast Guard only monitors distress signals from emergency position indicating radio beacons EPIRBs that broadcast using digital 406 MHz signals 2 Digital 406 MHz models became the only ones approved for use in both commercial and recreational watercraft worldwide on January 1 2007 3 Maritime Mobile Service frequencies EditInternational 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 Many other MRCCs for example most in Northern Europe now only have MF capabilities and no HF 5 Several HF maritime voice frequencies exist for long distance distress calls 6 4125 kHz 6215 kHz 8291 kHz 12290 kHz 16420 kHz 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 systemDigital selective calling frequencies Edit Several maritime frequencies are used for digital selective calling DSC and they are also monitored for DSC distress signals 6 7 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 70Aeronautical frequencies Edit121 5 MHz is the civilian aircraft emergency frequency or International Air Distress frequency It is used by some civilian emergency locator beacons however the Cospas Sarsat system no longer monitors the frequency 243 MHz for NATO military aircraft emergency frequencies 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 systemSearch And Rescue frequencies Edit123 1 MHz Aeronautical Auxiliary Frequency International voice for coordinated SAR operations 138 78 MHz U S military voice SAR on the scene use This frequency is also used for direction finding DF 155 160 MHz 172 5 MHz U S Navy emergency sonobuoy communications and homing use This frequency is monitored by all U S Navy ASW aircraft assigned to a SAR mission 282 8 MHz Joint combined on the scene voice and DF frequency used throughout NATO 406 MHz 406 1 MHz Cospas Sarsat international satellite based search and rescue SAR distress alert detection and information distribution system Emergency position indicating radiobeacon station EPIRB Search and rescue transponder SART Survival radioAmateur radio frequencies EditVHF UHF calling frequencies can also be used to make emergency calls Edit Band Global Region 1Europe Africa Region 2The Americas 8 Region 3Asia13 cm23 cm 1294 500 MHz U S 33 cm N A 927 500 MHz U S N A70 cm 433 500 MHz EU 446 00 MHz U S 1 25 m N A 223 500 MHz U S N A2 m 145 500 MHz EU 146 520 MHz U S amp Canada 145 000 MHz India Indonesia amp Thailand 2 m 144 740 MHz Philippines 9 4 m 70 450 MHz EU N A6 m 52 525 MHz10 m 29 600 MHz12 m RTTY Packet onlyMF and HF frequencies Edit Emergency Centre of Activity ECOA frequencies informally established by the International Amateur Radio Union regional organizations Band Global 10 11 Region 1 12 Europe Africa Region 2 13 The Americas Region 3 14 Asia15 m 21360 kHz17 m 18160 kHz20 m 14300 kHz30 m40 m n a 7110 kHz 7060 kHz 7240 kHz 7275 kHz 7110 kHz60 m n a80 m n a 3760 kHz 3750 kHz 3985 kHz 3600 kHzEmergency Disaster Relief Interoperation Voice Channels of the amateur radio Global ALE High Frequency Network 15 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 USBOther frequencies EditCitizens band CB radio not available in all countries Emergency channels 9 27 065 MHz AM and 19 27 185 MHz AM GMRS 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 sometimes referred to as Orange Dot by some transceiver manufacturers who associated a frequency with a color code for ease of channel coordination until the creation of the Family Radio Service in 1996 GMRS 675 or Channel 6 20 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 After FCC deregulation of simplex FRS GMRS radios FRS users may transmit up to 2 watts on the GMRS emergency channel 20 462 675 MHz with 141 3 Hz CTCSS or channel 20 22 MURS 151 940 MHz only available in the United States FRS FRS channel 1 462 5625 MHz carrier squelch no tone or sub channel channel 3 462 6125 MHz 16 and channel 20 462 6750 MHz 141 3 Hz CTCSS channel 20 code 22 or channel 20 22 UHF CB Australia Emergency channels 5 35 476 525 477 275 MHz 17 Channel 5 is the designated simplex and repeater output emergency channel while channel 35 is used as the repeater input frequency for duplex operation UHF CB is only available in Australia and New Zealand PMR446 Europe Channel 1 analog 446 00625 MHz CTCSS 100 0 Hz channel 1 12 Channel 8 analog 446 09375 MHz CTCSS 123 0 Hz channel 8 18 PMR446 Europe Mountain Rescue Channel 7 analog 446 08125 MHz CTCSS 85 4 Hz Channel 7 7 in most radios not all See also EditAircraft emergency frequency Distress signal Global Maritime Distress Safety System Mayday SOSReferences Edit Bartlett Tim 2006 VHF Handbook Southampton The Royal Yachting Association pp 28 31 ISBN 978 1 905104 03 1 Logon Form www piersystem com Logon Form www piersystem com USCG Commercial Fishing Vessel Safety Program 13th Coast Guard District Guardians of the Pacific Northwest www uscg mil UK Hydrographic Office 2017 Volume 1 NP281 Maritime Radio Stations Parts 1 amp 2 UK UK Hydrographic Office a b HF Distress and Safety Watchkeeping Schedule U S Coast Guard Navigation Center U S Coast Guard Retrieved Oct 12 2011 Recommendation M 541 Operational procedures for the use of digital selective calling equipment in the maritime mobile service International Telecommunication Union 2015 ARRL Band Plans https ntc5 ntc gov ph wp content uploads 2019 09 mc 04 03 2011 authorizing the use of RF in times of emergency pdf bare URL PDF IARU Emergency Telecommunications Guide PDF Archived from the original PDF on 2018 09 20 Emergency Center of Activity Frequencies adopted by the IARU Region 1 General Conference 2005 PDF Archived from the original PDF on 2018 11 14 Ulli DK4VW HF International Amateur Radio Union Region 1 iaru r1 org Archived copy PDF Archived from the original PDF on 2013 04 08 Retrieved 2013 05 06 a href Template Cite web html title Template Cite web cite web a CS1 maint archived copy as title link Archived copy PDF Archived from the original PDF on 2013 04 08 Retrieved 2013 05 06 a href Template Cite web html title Template Cite web cite web a CS1 maint archived copy as title link INC copyright 2007 HFPACK HFLINK HF Automatic Link Establishment HF ALE HF Network Ham Radio Amateur Radio HF Emergency Disaster Relief Communications hflink com SHTF Survialist Radio Frequency Lists 29 June 2013 ACMA Fact Sheet Citizen band radio Retrieved from https en wikipedia org w index php title International distress frequency amp oldid 1123909705, wikipedia, wiki, book, books, library,
