RadioRaft 3.21

Click Here for Updating Details from V3.00 / V3.20

Multimode Radio Data Decoder Software for decoding
12 ARQ modes, 10 FEC modes,  3 packet modes and many others ...

By François Guillet F6FLT                     Espa ñ ol flag-fr.gif 
(877 octets)     Francais bandera-fr.gif(877 octetos)    Deutschbandera-de.gif (853 octetos)

What RadioRaft is

RadioRaft is a multimode radio data decoder software, created by François Guillet, F6FLT. It allows decoding the most of the data transmission modes used by many services: maritime, aeronautical, emergency, radioamateurs, press agencies, embassies, armed forces, police, humanitarian expeditions...
For more details on the features, see below the "Modes and features" section.

RadioRaft was primarily intended for enthusiasts in radio technology but several organisations use it now for professional monitoring as well as novices and beginners because it's so easy to use.

What You Need for RadioRaft:

In order to run RadioRaft you need at least a PC 486 or Pentium with a 3"5 diskette driver, MsDOS 6.2 or above, VGA screen, a COM port, a radio receiver and a simple interface connecting the speacker or audio output to the COM port.

After installing RadioRaft on your PC, just connect your PC to the receiver through the interface (HamComm/JVFAX compatible),  or through one of the range of Pervisell Demodulators, and RadioRaft works.


The RadioRaft software package includes the complete documentation in 2 files: the RadioRaft user's main guide and the RadioRaft modes user's guide. They are provided both in HTML and TEXT format. You may read them right now from your browser. They are also available from the "Help" menu when RadioRaft is running.

Modes and features

The RadioRaft functioning is fully automatic. You just need to tune your receiver on a station using a compatible mode (see the list below). RadioRaft tracks the signal, searches for the right mode, the right speed, the right shift and displays any possible text in just a few seconds.

In short, it offers all features that make radio data decoding easy, practical and fast.


Decoding Display, Printing
Automatic mode detection/identification Tools Possible window to display the status of the reception (phasing, repetitions, errors...)
Automatic speed detection Frequencymeter Graphic frequency/shiftmeter
Automatic shift detection Shiftmeter Possible display of special non printable characters
Automatic signal tracking (no need to precisely tune the receiver) Baudmeter

Several available video modes

Demodulations :
DIGIT mode for bit by bit analysis, with numerous options Instantaneous language swap,
French / English
Parameters of the automatic decoding strategy are modifiable by user Set of particular options for the most of modes Printer selectable
Speed from 10 up to 6400 bauds,
at any mode
Help on line Continuous or on request printing, into a file or a printer



Modes of radio data transmissions that RadioRaft decodes are:

Asynchronous or quasi-synchronous modes FEC modes
BAUDOT ARQ semi-duplex modes SITOR-B (Amtor-B)
ASCII (7 or 8 bits, parity or not) SITOR-A (Amtor-A)
POCSAG ARQ full-duplex modes
ARQ-6/90 & ARQ-6/98 CIS 11 (Torg 11) ARQ-M2
Packet modes and miscellaneous SI-ARQ 4, 5, 6, 7 FEC-A (Fec-1000) ARQ-M4
ACARS DUP-ARQ (Artrac) SPREAD 11, 21, 51


DIGIT 1382
All mode designations are in accordance with the Klingenfuss Radio Data Code Manual, 15th edition. See Klingenfuss Publication to obtain more information on books about radio decoding and on frequency lists.

Here is the list of modes by alphabetical order. Click the mode to get more details by entering the RadioRaft mode user's guide.

SITOR-B (Amtor-B) SPREAD (11, 21, 51) SWED-ARQ UOSAT Oscar-11 1382
      BaudMeter DIGIT

Obtain RadioRaft

You may get the RadioRaft decoder software from the Internet network, for installation on your PC. What you need to do is:

  1. Download the software to your PC (file Raft321.exe or
  2. Expand the archive file or execute the file Raft321.exe in a directory on your hard disk (Raft321.exe is a self-extracting program)
  3. Execute RR.EXE for a quick start, or see the file ReadMe.txt for more details about the installation

Click here to download RadioRaft version 3.21, ZIP file:

RadioRaft 3.21 (file - 263,116 bytes )

Or click here to download RadioRaft version 3.21, self-extracting file:

RadioRaft 3.21    (file Raft321.exe - 303,751 bytes)

Before you go any further, just take a look at the Screen Shots

For the "Windows only" users:

Windows users not familiar with DOS may download also these 2 files. They are not required to run RadioRaft. They just simplify the launch.
Click here to download the RadioRaft Windows launchers:

RRlauncher    (files RRrealMode.pif  and RR underWindows.pif    2Kb)

Extract the .pif files from the .zip archive and put them onto your desktop or in a folder.
Run RadioRaft by just clicking them.

The first one launches RadioRaft in real mode DOS as you wouldn't have a Windows environment. It is the best way to run RadioRaft. See the section "RR and Windows" for more details.

RadioRaft free version

The software package that you download permits you to install a free version, not limited in time. It has all the features of the full version but a limited number of modes. You can receive CW Morse, SITOR-A (or Amtor-A), ARQ-E, FEC-A, BAUDOT. The "DIGIT" mode for bit by bit analysis is also available.
From the free version you may also make a diskette that permits you to install the full version if you register.

Get RadioRaft full version

For receiving all the modes noted in "Modes and features", you need to register. See the file "Order.txt" for all details.
When RadioRaft free version is running, you can also get and print the order form from the menu "
Help/Obtain the full version"

You can install the full version only from a diskette. If you have installed the free version, you may create yourself a RadioRaft disk (menu "
File/Create a diskette"). This permits you to save time and money.

Payments by credit cards are accepted only by authorised distributors. If you are in hurry to use RadioRaft and want speedy registration, contact Pervisell Ltd (UK) or Dieter DIPPEL (Germany).

Update from version 2.xx

The update for the registered users of RadioRaft 2.xx is £13.99 . Proceed as for the full version but enter your Version 2.xx code in the "Call Sign" box on the order form and you will automatically only be charged £13.99.

Update from version 3.00 / 3.20

The update from version 3.00 / 3.20 is free, but only by Internet. Neither the author nor Pervisell provide the upgrade by mail. If you are registered user for version 3.00 / 3.20, all you have to do is:

- download the software package as indicated above.
- copy all the files to your original RadioRaft diskette, version 3.00 / 3.20 (you may directly expand the ZIP file on the diskette). You must replace the previous files with the new ones.
Don't use a diskette other than the one that you used to install the full version 3.00 / 3.20.
- install again from the diskette. Use the same confidential code as for version 3.00 / 3.20. You can install in the same directory as the previous version.

Note: if your diskette have no tag to remove the write protection, mask the write protection hole with a sticker on both sides of the diskette, copy the files and remove the sticker before installing the software.

Radio/PC interface, distributors


What hardware to use? A simple interface. Here it is:

Interface RadioRaft

More on the interface and its connection (to the user's guide)

If you are not familiar with electronics could obtain an interface that is ready to use. The following distributors in UK, GERMANY, FRANCE, USA provide interfaces sucessfully tested with RadioRaft by the author:


Version History of RadioRaft

If you are registered for a version 3.xx, you may install any version from 3.00 up to 3.99.

Frequently Asked Questions (FAQ) on RadioRaft

RadioRaft under Windows

RadioRaft is a pure DOS program working in "real mode" (see above the FAQ for more information, or if you get a memory error when RadioRaft starts).
Theoretically you have to boot your PC in DOS mode before launching RadioRaft.

RadioRaft is only compatible with Windows 98 and previous versions.
RadioRaft is not compatible with Windows 2000 or XP. If you have Windows 2000 or XP, you will have to boot your PC from a floppy disk with DOS, and your hard disk must have been formatted with FAT16 or FAT32 in order to be accessible from DOS.
Thanks to Barry Stone G6SRE for this useful tip

Nevertheless you may run RadioRaft without quitting Windows: with a Pentium II or more, the decoding is a bit disturbed but all's well up to 200 bauds. Faster the baud rate, worse the error rate: Windows slows the real time decoding process even if there is no other applications working in the same time. At 1200 bauds or more it's not possible to get a correct decoding under Windows.

In order to launch easily RadioRaft from Windows, two "PIF" files are provided, outside of the RadioRaft package. See the section Download RadioRaft to get them. One permits to launch RadioRaft in real mode DOS as you would reboot your PC, the other one to run RadioRaft in the multi-task Windows environment with the inconvenient mentioned above. 
Put these files onto your desktop or in the RadioRaft folder with shortcuts onto your desktop. You will get the 2 icons ("RR real mode" and "RR under Windows").

If you have not installed RadioRaft in the default folder (C:\RADIORAF), click right on the icons, select "Properties" then the "Program" tab and correct the path to access the RadioRaft directory.

"RR under Windows" runs RadioRaft in full screen mode. You can move to other Windows applications using the key Alt+Tab or coming back to a window using "Alt+enter". You may also modify the icon properties and choose the Window size in the "program" tab.

For the best decoding, RUN RadioRaft from the "RR real mode" icon.

Who developed RadioRaft, Requests

I'm François Guillet, F6FLT, a French radioamateur interested in radio data decoding, and a programmer in assembler.

Questions on RadioRaft are welcomed, but only by email.
Please don't ask me about frequencies or decoding in general (question of time!)
Special implementations or designs to customize the software: contact me for an estimate.

Email address: or
Postal adress:

François Guillet
10 route des Goulets
44880 Sautron

Before contacting me for information, re-read the documentation. Answers to most of the questions you might ask are there (see the FAQ, order form, RadioRaft interface distributors, full version, list of frequencies, Glossary, What's new in version 3.21, RadioRaft user's main guide, RadioRaft modes user's guide).

What I am looking for is any information about protocols of new modes, as text documentation and audio files of recorded samples (.WAV format, 16 bits at 22 khz sample rate is enough). I would like to include them in RadioRaft (time permitting). Thanks in advance for a possible help.

Links for decoding

Following is a list of links for those who are interested in radio data transmissions and who want to decode all signals on the air. Sorry, the list is modest so far. It is just a beginning!

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