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| − | *ARQ-E: {{color|red|Obsolete}}
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| − | *ARQ-E3: {{color|red|Obsolete}}
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| − | *ARQ-FAE / [https://www.sigidwiki.com/wiki/ALE-400 ALE400]
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| − | **[http://hflink.com/ale400/ ALE400 on HFLink.com]
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| − |
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| − | * [https://www.sigidwiki.com/wiki/Radio_Teletype_(RTTY) Baudot RTTY (ITA2)]
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| − | **[http://www.arrl.org/digital-transmissions ARRL Digital Transmissions]
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| − | **[https://www.dwd.de/DE/fachnutzer/schifffahrt/funkausstrahlung/_node.html Deutscher Wetterdienst (German weather service)] Use Google translate
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| − | * [https://www.sigidwiki.com/wiki/Contestia Contestia]
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| − | *Coquelet: {{color|red|Obsolete}}
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| − | * [https://www.sigidwiki.com/wiki/Differential_Global_Positioning_System_(DGPS) DGPS]
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| − | ** Note: No longer active in the US
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| − | * [https://www.sigidwiki.com/wiki/DominoF DominoF]
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| − | * [https://www.sigidwiki.com/wiki/DominoEX DominoEX]
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| − | * [https://www.sigidwiki.com/wiki/WEFAX FAX (aka RadioFax, WeatherFax, WeFax)]
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| − | **[https://www.weather.gov/media/marine/rfax.pdf NOAA RadioFax schedules (PDF)]
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| − | **[http://www.udxf.nl/Fukushima-fax-sked.pdf Fukushima Fisheries Radiofax Schedule]
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| − | * [https://www.sigidwiki.com/wiki/GMDSS_Digital_Selective_Calling GMDSS / DSC]
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| − | * [https://www.sigidwiki.com/wiki/Hellschreiber Hellschreiber]
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| − | **[https://sites.google.com/site/feldhellclub/Home/frequencies Hell Frequencies]
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| − | * [https://www.sigidwiki.com/wiki/High_Frequency_Data_Link_(HFDL) HFDL]
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| − | ** [https://dxinfocentre.com/hfdl.htm Worldwide HFDL HF Aeronatuical Stations]
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| − | * [https://www.sigidwiki.com/wiki/PACKET HF Packet]
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| − | **[https://wiki.complete.org/PacketRadioOnHF#:~:text=The%20RF%20protocol%20used%20by,you'll%20be%20using%20SSB. Packet Radio on HF]
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| − | * [https://www.sigidwiki.com/wiki/JT65 JT65 (A, B, C)]
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| − | **[http://hflink.com/jt65/ HFLink JT65A page]
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| − | * [https://www.sigidwiki.com/wiki/Lentus Lentus]
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| − | * [https://www.sigidwiki.com/wiki/Multi_Frequency_Shift_Keying_(MFSK) MFSK 8/16/32/64]
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| − | **[http://www.arrl.org/digital-transmissions ARRL Digital Transmissions]
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| − | **[https://swradiogram.net/ Shortwave Radiogram]
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| − | ***Note: Other modes are often included in these broadcasts. See the website for information
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| − | * [https://www.sigidwiki.com/wiki/MIL-STD-188-110_Appendix_A_16-Tone MIL-STD-188-110A]
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| − | ** Rarely reported
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| − | ** Note that this mode has been used during Armed Forces Day in the US over the last couple of years
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| − |
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| − | * [https://www.sigidwiki.com/wiki/Automatic_Link_Establishment_(2G_ALE) MIL-STD-188-141A/B (aka ALE or ALE2G)]
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| − | **This mode is used both by hams and numerous military and non governmental organizations around the world. There are hundreds - sometimes more than a thousand - reports in the UDXF every month
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| − | **[http://www.hflink.com/ HFLink]
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| − | **[https://wiki.radioreference.com/index.php/ALE_Networks ALE Networks]
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| − | * [https://www.sigidwiki.com/wiki/MT63 MT63]
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| − | * [https://www.sigidwiki.com/wiki/Olivia Olivia]
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| − | **[http://hflink.com/olivia/ HFLink Olivia page]
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| − | * [https://www.sigidwiki.com/wiki/PAX PAX / PAX2]
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| − | * [https://www.sigidwiki.com/wiki/PACTOR_I PACTOR-1]
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| − | **Rarely reported
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| − | **This mode is also used in the maritime industry
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| − |
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| − | * [https://www.sigidwiki.com/wiki/Phase_Shift_Keying_(PSK) PSK 31 (various speeds, BPSK or QPSK)]
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| − | **[http://www.arrl.org/digital-transmissions ARRL Digital Transmissions]
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| − | * [https://www.sigidwiki.com/wiki/RTTYM RTTYM]
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| − | * [https://www.sigidwiki.com/wiki/SITOR-A SITOR-A] (aka AMTOR Mode A or AMTOR-ARQ)
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| − | **There are only a small handful of HF maritime stations that use this mode. Most have gone over to PACTOR, using heavy compression and encryption techniques.
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| − | **This mode is also used by the Ministry of Foreign Affairs (MFA) Egypt using the ATU80 alphabet which makes reading this traffic difficult. See this [http://www.udxf.nl/Decoding-MFA-Egypt.pdf PDF] from the UDXF website for a further discussion on this topic
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| − |
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| − | * [https://www.sigidwiki.com/wiki/SITOR-B SITOR-B] (includes NAVTEX; aka AMTOR Mode B)
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| − | **Note that MFA Egypt has also been known to use this mode
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| − | **[https://www.dxinfocentre.com/maritimesafetyinfo.htm HF Worldwide RadioTelex Broadcasts]
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| − | **[https://dxinfocentre.com/navtex.htm NAVTEX Broadcasts]
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| − | **[https://www.weather.gov/marine/uscg_broadcasts Marine Weather Broadcasts from the US Coast Guard]
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| − | * [https://www.sigidwiki.com/wiki/Slow-Scan_Television_(SSTV) SSTV]
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| − | ** [https://www.amateur-radio-wiki.net/sstv-frequencies Amateur Radio Wiki - SSTV Frequencies Everything You Need to Know]
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| − | ** HF pirates often use this mode as well as hams
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| − | * [https://www.sigidwiki.com/wiki/STANAG_4285 STANAG 4285] (listed just as '4285')
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| − | **This mode is usually heavily encrypted which no program can decode; however it can be read when the station sends a test tape in the clear.
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| − | **A listing of STANAG stations from 2020 can be found in the 'Files' section, 'Ute Info' folder of the UDXF reflector. Both text and spreadsheet formats are available
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| − | ** [http://www.udxf.nl/Some-Notes-on-STANAG4285.pdf Some Notes on STANAG4285 - A DXers View (PDF)]
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| − |
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| − | * [https://www.sigidwiki.com/wiki/THOR Thor]
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| − | * [https://www.sigidwiki.com/wiki/THROB Throb / ThrobX]
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| − | * [https://www.sigidwiki.com/wiki/VOICE Voice]
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