Welcome to the ndblist.info Datamodes Section. On this page you will find links and resources for all the modes covered by the DGPS LIST which covers DGPS DXing, Time Signal Stations monitoring, Weather FAX broadcasts and other similar Navigation modes such as LORAN etc. and our other sister groups, the NAVTEX DX List which specialises in the NAVTEX mode, and the brand new DSC LIST, which is now exclusively devoted to DSC / GMDSS DXing. Please click on the buttons below to visit the appropriate sites and sections, or check below for more information on how to join these groups. Please note that these groups are offshoots of the NDB LIST, and anyone with an interest in Non Directional Beacons, Propagation Beacons or any other types of analog radiobeacon, should visit the NDB List home page at: http://www.ndblist.info for more information about them.

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Below you will find information and links about DGPS Beacons, DSC Stations, LORAN, Time Signal systems and NAVTEX Stations, all of which are becoming an increasingly popular DX target by many NDB and LF enthusiasts. You will also find details about a number of useful programs that can be used for the decoding and monitoring of these modes, plus a database of DGPS Beacons and NAVTEX Stations, and also a number of links which will take you to websites giving lots of additionally useful information as well. Members of the groups, or creators of software are more than welcome to have their own files and links included here as well if they think they will be of interest to our members.


DSC MAILING LIST:

Formerly a mode covered on the DGNAV List, this increasingly popular mode now has its very own specialist group which is totally dedicated to it, with a great new program such as the excellent 'YaDD' decoding these signals has never been easier, and more and more people are discovering the fun of monitoring these signals on the various MF, HF and VHF Bands (2, 4, 6, 8, 12, 16 & 156 MHz etc.) every day. To join the group just click on the link below:

DSC List
To join the group or find out more visit the group's page at: https://groups.yahoo.com/neo/groups/dsc-list/info

DGPS MAILING LIST:

Formerly known as the DGNAV List, this specialist group is now dedicated to the DGPS mode, though of course we don't mind a posts about LORAN, Time Signals and Weather Fax subjects as well. You can now find the DSC/GMDSS coverage in its own brand new specialist group, which is totally devoted to this increasingly popular subject. You can find details about the group below. The International DGPS band covers frequencies between 283.5 and 325 kHz, and can be decoded using programs such as 'DSCdecoder, Multipsk and Spectrum Lab (plus a few others). To join the group just click on the link below:

DGPS List
To join the group or find out more visit the group's page at: https://groups.yahoo.com/neo/groups/dgpslist/info

NAVTEX DX MAILING LIST:

This new specialist group, which is run by Dirk Claessens, now covers the NAVTEX mode exclusively for those with an interest in this subject. The group members monitor long distance transmissions on both longwave (490.0 & 518.0 kHz) and shortwave (4209.5 & HF NDBP). NAVTEX transmissions consist of navigational and meteorological warnings and forecasts, as well as urgent marine safety information to ships.

NAVTEX DX List
To join the group or find out more visit the group's Yahoo page at: https://groups.yahoo.com/neo/groups/navtexdx/info

LINKS TO USEFUL DGPS, DSC, LORAN, NAVTEX, FAX & TIME SIGNAL RELATED SOFTWARE:

CocoaModem cocoaModem: - This program created by W7AY for Mac users, will decode various datamodes including NAVTEX, FAX and CW and may be of interest to many of the Mac users who are presently underserved in this field, this program is not free, but may be of interest to some enthusiasts.
DBR Control DBR Control: - Tom Becker's excellent and unique control software for running DGPS Beacon receivers like the JRC NRB-2J (and its Raytheon M93511 and Autohelm equivalent), Garmin GBR-21 and GBR-23, Lowrance/Eagle, Magnavox/Starlink/Leica/CSI/Furuno/MX-Marine/Hemisphere and probably most other DGPS LF beacon receivers. It can decode and log the 4800bps serial data (RTCM binary in Magnavox-standard 6-of-8 format) they produce.
DSCdecoder DSC DECODER - DECODING SOFTWARE: - This comprehensive decoding software, produced by COAA, the creators of the popular 'Shipplotter' and 'Planeplotter' software, now includes the ability to decode DGPS signals as well as DSC and Navtex. This will run on any suitable Pentium level PC running Win95/98/ME/2K/XP, and with a compatible soundcard, and comes at a very reasonable price for the registered version of just 25 Euros. You can download a 21 day demo version from their site, and this will give you the chance to try out this mode, and see if you like it - just follow this link to the download page.
FLDIGI FLDIGI - DECODING SOFTWARE: - This 'freeware' program will decode a number of modes such as PSK31, Domino, Hell, Olivia, MT63, Throb, WEFAX and a few others, and it also includes an option for decoding NAVTEX/SITOR MODE B as well. There is nothing fancy about this, but it's certainly one of the easiest programs to operate in the NAVTEX mode so may appeal to some users. You can download the latest copy in Windows, Linux or Mac versions from the link above.
GMDSS Decoder GMDSS DECODER FOR MULTIPSK: - An excellent 'free' utility program by Mike Simpson, which reads the GMDSS output from MultiPSK and displays the ship/shore stations received in a spreadsheet type grid. Well recommended if you are using MultiPSK and interested in the DSC mode. (NOTE# this should only be used with Windows 7 as it may cause problems when run with Windows XP.)
HOKA Code 300 HOKA CODE 300: - The most advanced data analyzer demodulator and decoder for HF and VHF/UHF digital signals, with prices to match.
JNX JNX - JAVA BASED DECODER: - A Java based decoder that will run on Mac, Windows or Linux systems, this no frills Navtex Decoder might be of interest to some users, and comes free of charge.
JVComm32 JVComm32 DECODING SOFTWARE: - Another veteran program, and one which has many ham applications such as SSTV, FAX and RTTY, it now also includes a NAVTEX decoding facility as well. This is shareware program, but you can download a fully working demo copy to try it out.
MixW MixW HAM DECODING SOFTWARE: - A popular program with many Radio Amateurs due to the number of modes it can receive (and transmit), this will also decode NAVTEX signals with its 'AMTOR' mode.
MSCAN METEO PRO MSCAN METEO PRO: - A well established decoding program, which will decode NAVTEX, RTTY and Weather FAX signals.
MultiMode MULTIMODE: - This program will decode numerous data modes, including DGPS, but is designed especially for Mac users, and is produced by Black Cat Systems.
MultiPSK MULTIPSK DECODING SOFTWARE: - This excellent 'freeware' program by Patrick, F6CTE, covers many popular Amateur modes, and from version 4.9 onwards will also decode DGPS signals as well (you'll find it in the Professional Modes section).
Navtex Decoder NAVTEX DECODER: - A new 'freeware' program from Mark Longstaff-Tyrrell, this is an ideal starting point for the newcomer to the hobby.
Navtexvw NAVTEXview: - Animated word. New.** NEW VERSION 2.2 NOW AVAILABLE** (August 2014) Animated word. New.
This is a wonderful little freeware utility program, developed and kindly supplied to us by Tobias Taufer (T2) from Germany, and designed to show the NAVTEX Schedules. This program allows the user to create a window on their desktop which will show stations which are active in 'real time', and also those that are coming up next. We would definitely recommend it to all NAVTEX fans! Our thanks to Tobias for creating, developing and sharing this impressive program with us. (Just unzip it to a folder and then double click on the 'NAVTEXvw.exe' icon to run it)(260kb - zipped - data updated 13th of September 2014 (using WNDB v12.8)

NOTE# - Tobias also produces another excellent program called EIBIview, which covers Shortwave Broadcast Schedules, and can be downloaded from this site: http://www.eibispace.de/
Navtexvw NAVTEXview RE-PLAYER/FOOBAR2000: - Tobias also came up with a very interesting method of re-playing pre-recorded NAVTEX signals using the Foobar 2000 player, and this creates a handy feature which can be used when the NAVTEX sound is not real-time but comes from a recorded soundfile. This will work in combination with NAVTEXview. The relative playback duration is then displayed in the titlebar (caption) of Foobar2000, making it possible for NAVTEXvw to read it and continuously calculate the true recording time, provided you remember at what time you have started your recording. Tobias says that this method may sound a bit difficult, but it's real simple in use and makes offline nighttime DXing possible at any time. (3.47MB - zipped)
NDBfinder NDBFINDER DECODING SOFTWARE: - This program was produced by Bev at COAA for use in decoding very weak NDB Signals, but now also includes the ability to decode LORAN signals. Not freeware, but a 21 day fully working trial version can be downloaded from this link.
Radio Clock RADIOCLOCK DECODING SOFTWARE: - This program was produced by Bev at COAA for use in setting the clock on your PC using Time Signal Stations, but is also useful for in helping to identify them. Works as freeware unless the extra features are required and can be downloaded from this link.
Radio Raft 3.21 RADIO RAFT - VERSION 3.21 DECODING SOFTWARE: - A DOS based data decoding programme by François Guillet F6FLT, this decodes many different modes such as ACARS, SITOR, ARQ, CW, Packet, PACTOR etc. but more importantly, it also decodes DGPS Beacon signals!
SeaTTY SEATTY: - An excellent NAVTEX & RTTY decoding program by DX Soft, this decoder "time stamps" your catches, and is ideal for monitoring NAVTEX channels over long periods.
Spectrum Lab v2.74 b7 SPECTRUM LAB - VERSION 2.78 DECODING SOFTWARE: - This popular program can now also decode DGPS signals, and best of all it's free of charge. This excellent program from DL4YHF is not quite as user friendly as some of the others, but is well worth taking the trouble to get to know.
TrueTTY TrueTTY: - From the same stable as SeaTTY, this programme will decode a number of other data modes as well as NAVTEX, but it doesn't time stamp them.
WWSU 6.4 WWSU 6.4: - Not a decoding program, but an excellent database program showing NDBs, NAVTEX and DGPS stations and beacons. Created by Alex, VE3GOP, this is an excellent piece of software for any DGPS enthusiast to have at their disposal. Also very useful for creating your logs, and can be edited to show any notes you wish to make.
YaDD YaDD (Yet another DSC Decoder): Animated word. New.** NEW VERSION 1.6.3 - 27th March 2014 ** Animated word. New. - This excellent new program, also created by Dirk Claessens, now gives DSC enthusiasts a new alternative to existing DSC Decoding software, and with a user friendly interface. ** highly recommended **
YaND YaND (Yet another NAVTEX Decoder): Animated word. New.** NEW VERSION 6.4 - 6th April 2014 ** Animated word. New. - This superb program, without doubt the most comprehensive one currently available, was created by Dirk Claessens, a very experienced NAVTEX enthusiast from Belgium, and offers a large number of unique features. This is a most welcome addition for fans of this mode, and what a great name!:-) ** highly recommended **
YaND Manual YaND Manual v5.3.1: - This is an English language manual for the YaND program above (613kb).


USEFUL DGPS, DSC, NAVTEX, LORAN, FAX & TIME SIGNAL RELATED ARTICLES AND INFORMATION FILES:

DGPS Guide AN INTRODUCTION TO DGPS DXING v2.1
If you are thinking about giving this mode a try then this file will give you some useful information to help you get started. (updated and revised January 2011, 25 pages 1.75MB)
A Guide to NAVTEX DXing AN INTRODUCTION TO NAVTEX DXING v2.2:- Animated word. New.** UPDATED MARCH 2013 ** Animated word. New.
This guide gives a little more information about the mode of NAVTEX, the equipment used to receive it, and some information about how to understand the various messages that you will receive. (updated and revised March 2013 - 423.0kb)
Interfacing your radio and PC CONNECTING YOUR RADIO TO YOUR COMPUTER:
If you are wondering how to connect your receiver to your PC this new "interfacing" guide will help you to get started. (754.0kb)
DGPS Station File DSC DECODER 'DGSSTN FILE:
Brian Keyte has provided a comprehensive list of DGPS beacons which users of DSCdecoder can use to replace the basic one that comes with the program, you can download and replace your existing on with this file (rename your old file something like 'olddgpsstn.txt' first if you don't wish to destroy it, you can always replace again at later date if you should wish). (4.0kb)
Double DGPS DOUBLE DGPS:
Martin Francis came up with a useful way of receiving beacons of both bit rates using Skysweeper, find out how in this article. (685.0kb)
DGPS Formats DGPS FORMATS:
Brian Keyte takes a look at DGPS Message Formats in this article. (16.1kb)
DGPS Beacons of the World DGPS BEACONS OF THE WORLD v10.0 (Sorted by frequency):
This 19 page printable .pdf version of the database currently contains a list of known DGPS beacon information and is sorted by frequency order. Latest updates include one new Chinese beacon, plus a number of minor corrections. Any corrections or changes are always greatly appreciated. (This edition was last revised on the 28th of April 2014 - 289.0kb)
DGPS Beacons of the World DGPSSTN FILE FOR DSCDECODER:
NOTE# - You can download a special version of the 'dgpsstn.txt' file which exists in the DSCdecoder program with one that lists just about all the known DGPS Beacons in the world world. You will need to customise this for the part of the world where you are located to get it to work properly, and you can download a copy of the instruction file from the link below, which will explain how to do this.

Download the dgpsstn instruction file  'HERE':
DGPS Message Types DGPS MESSAGE TYPES:
This document gives a good explanation of the various DGPS Message Types and what they do. (88.5kb)
DGPS QSL ADDRESS LIST DGPS QSL ADDRESS LIST v1.2 (.pdf version):
In response to demand for more DGPS QSL information I have now removed the basic section from all the other files and put them into one new dedicated publication. This brand new 3 page document attempts to put together known QSL addresses that have worked in the past, and also to make some suggestions for stations that haven't yet been confirmed. Any additional information or corrections, particularly e-mail address used for 'e-reports', that could help to make this more accurate and useful to DGPS DXers would be greatly appreciated. (created 20th of March 2013 - 50.9kb - my thanks to Karl-Erik-Stridh for supplying much of the information in this edition.)
NAVTEX Abbreviations NAVTEX ABBREVIATIONS:  Animated word. New.** NEW EDITION v1.0 MAY 2013 ** Animated word. New.

This new printable 5 publication gives a comprehensive list of many of the terms and acronyms used on by the NAVTEX service: (29.9kb)
NAVTEX Logging NAVTEX LOGGING GUIDE:
CLE Co-ordinator Brian Keyte, advises on what constitues a 'good' NAVTEX logging. (15.2kb)
NAVTEX QSL ADDRESS LIST NAVTEX QSL ADDRESS LIST v3.7 (.pdf version):- Animated word. New.** UPDATED APRIL 2013 ** Animated word. New.
This 9 page document attempts to put together known QSL addresses that have worked in the past, and also to make some suggestions for stations that haven't yet been confirmed. Any additional information or corrections, particularly e-mail address used for 'e-reports', that could help to make this more accurate and useful to NAVTEX DXers would be greatly appreciated. (this edition created 28th of March 2013 - 96.4kb) our thanks to Roberto Rizzardi and Patrick Robic for the latest updates and corrections to this edition, especially the details of the Split Radio and Sellia Marina address, contributions from users are always greatly appreciated :-)
NAVTEX Times NAVTEX TIMES:
Another useful printable guide to how the various NAVTEX Time Slots work. (28.2kb)
NAVTEX Award Programme US COAST GUARD NAVTEX AWARD PROGRAM:
This document explains how to get yourself a very nice award certificate for receiving the US Coast Guard's NAVTEX Transmissions. To see a sample of what the certificate looks like click here: (31.4kb)
World NAVTEX Database WORLD NAVTEX DATABASE v12.8 (.pdf version):- Animated word. New.** UPDATED 13th of September 2014 ** Animated word. New.

This 16 page printable .pdf version of the database currently contains a list of known NAVTEX Stations, any updates or contributions are always greatly appreciated, my thanks to Vincent Lecler from France, Steve from Swindon and Tobias from germany for some useful information and a number of corrections. (This edition was last revised on the 13th of September 2014 - 128.0kb)


LINKS TO USEFUL DGPS, NAVTEX, DSC, LORAN & TIME SIGNAL RELATED WEBSITES:

  • Australian DGPS Service:
  • Canadian Coastguard DGPS Service:
  • Clifton Laboratories Low Pass Filter: - excellent for NDB/DGPS/NAVTEX reception!
  • Commissioners for Irish Lights:
  • Digital Selective Calling:
  • Digital Selective Calling Article:
  • DSC Identifiers:
  • European Differential Beacons:
  • Frisnit NAVTEX Message Archive:
  • Homebrew DGPS Receiver:
  • IALA DGNSS Page:
  • ICS Electronics GMDSS Page:
  • International LORAN Association:
  • Joze Konda's Time Signal Logs:
  • LF Time Signal Links:
  • LORAN Information:
  • Marius Rensen's NAVTEX beginners guide:
  • Mark Hattam's NAVTEX reception page:
  • MSF Time Signal Outages:
  • NAVTEX Pad - iTunes application from Black Cat:
  • Nautel NAVTEX Transmitters:
  • NAVTEX Receivers:
  • NAVTEX Weather Abbreviations:
  • NAVTEX - What it is and how it works!:
  • Nick's Time Signals Page:
  • NIST Time & Frequency Pages:
  • Northern Lighthouse Board:
  • Orwell AIS:
  • Pervisell (suppliers of radio decoding software):
  • RNA-REU-RWW Online database:
  • Southern Avionics:
  • Suomen DGPS-ASEMAT (Finnish DGPS Status):
  • The Weather Window:
  • US Coast Guard DGPS Service:
  • US Coast Guard Nav Center:
  • US National Weather Service:
  • US Coast Guard DSC Service:
  • Utility Monitoring Central:  New
  • William Hepburn's NAVTEX Broadcast Page:
  • WSV - German Waterways DGPS:



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