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HF Maritime communications have undergone a radical change over the last several years. Many stations that used to have voice communications have either gone dark or using digital modes, some of which are not readable except to the intended target.  Let's take a look at what is out there.
 
  
==Voice==
 
* Although most voice communications are gone, there are some stations still on the air. Ships and stations are allocated in fixed frequency ranges, and you can find those ranges listed [https://www.navcen.uscg.gov/?pageName=mtHighFrequency here].
 
* The Canadians have the [https://www.ccg-gcc.gc.ca/publications/mcts-sctm/ramn-arnm/part1-eng.html Radio Aids to Navigation] 
 
* USCG Voice Marine weather broadcasts can be found [https://www.weather.gov/marine/uscg_broadcasts here]. Click the ''USCG HF Voice'' link
 
 
 
==Digital (below the AM broadcast band)==
 
* '''NOTE:''' Unless notes otherwise, the links for the various modes comes from the Signal Identification Wiki
 
*[https://www.sigidwiki.com/wiki/Differential_Global_Positioning_System_(DGPS) DGPS]
 
*[https://www.sigidwiki.com/wiki/SITOR-B SITOR-B/NAVTEX]
 
** [https://www.weather.gov/marine/uscg_broadcasts  USCG Marine Weather Broadcasts] '''Note:''' Select ''USCG HF SITOR''
 
 
==Drift Net Buoys and Navigational Aids==
 
* [https://www.hfunderground.com/board/index.php/board,40.0.html Drift Net Buoys Loggings (HF Underground)]
 
* [https://www.sigidwiki.com/wiki/Driftnet_Buoy_Radio_Beacon Drift Net Buoy Beacons]
 
 
 
==Digital (2-30 Mhz)==
 
*[https://www.sigidwiki.com/wiki/CODAR CODAR]
 
*[https://www.sigidwiki.com/wiki/GMDSS_Digital_Selective_Calling GMDSS/DSC]
 
*[https://www.sigidwiki.com/wiki/Radio_Teletype_(RTTY) Baudot RTTY]
 
*PACTOR
 
** [https://www.sigidwiki.com/wiki/PACTOR_I PACTOR I]
 
** [https://www.sigidwiki.com/wiki/PACTOR_II PACTOR II]
 
** [https://www.sigidwiki.com/wiki/PACTOR_III PACTOR III]
 
** [https://www.sigidwiki.com/wiki/PACTOR_IV PACTOR IV]
 
** [https://sailmail.com/wp-content/uploads/2016/02/smprimer.htm Sailmail Frequency List]
 
*[https://www.sigidwiki.com/wiki/SITOR-A SITOR-A]
 
** Guangzhou, Shanghai, Istanbul Radio (Turkey) Olympia Radio (SVO) Greece
 
*[https://www.sigidwiki.com/wiki/SITOR-B SITOR-B/NAVTEX]
 
*[https://www.sigidwiki.com/wiki/WEFAX Weather FAX (WEFAX)]
 
 
==Websites==
 
* When a hurricane (cyclone in the Pacific) is spotted, the [http://www.nhc.noaa.gov/ftp/pub/forecasts/recon/MIAREPRPD Tropical Cyclone Plan of the Day] will give you an idea of when the flights to track these storms will take place
 
* [http://www.udxf.nl/links.html UDXF Links page]  See the ''Maritime / NAVTEX'' section
 
* [http://www.udxf.nl/ute-info.html UDXF Files page]  See the ''Aero / Maritime'' section
 

Revision as of 20:36, 24 April 2021