RadioReference on Facebook   RadioReference on Twitter   RadioReference Blog

Go Back   The Forums > Service Specific Monitoring > Marine Monitoring Forum

Marine Monitoring Forum - This is the place to discuss monitoring marine communications

LinkBack Thread Tools Search this Thread Display Modes
  #1 (permalink)  
Old 09-04-2007, 1:19 PM
  Audio Feed Provider
Audio Feed Provider
Amateur Radio Operator
Amateur Radio
Join Date: Aug 2007
Location: Hope Valley, RI
Posts: 6
Default What's needed for SITOR?

I read the Utility Column in Popular Communications magazine regularly. I notice an increasing number of listeners are reporting maritime activity in the digital SITOR-A or SITOR-B modes. Can someone explain in simple terms what is needed to decode these transmissions at home? I would love to have that capability. What's the difference between SITOR A & B? I use an Icom IC-735 HF ham rig for my monitoring. I also have a Radio Shack DX400.
Reply With Quote
Sponsored links
  #2 (permalink)  
Old 09-04-2007, 2:59 PM
Wiki Admin Emeritus
  Amateur Radio Operator
Amateur Radio
Join Date: Jul 2002
Location: Bowie, Md.
Posts: 18,823

Keep in mind that logs in pubs like PopComm have a 60 day or more lag between when they receive the log, and when they actually publish.

A basic definition of SITOR can be had here;

There are a few variants of Sitor A reported on occasion - the Russians and Egyptian embassy have both used a variant in the past. Our wiki has
sites with audio samples of both Sitor A and B.

Keep in mind that at first, PACTOR sounds to the ear much like SITOR-A, but PACTOR can and does change transmission speeds, and there is
a special variant of PACTOR that is used by Globe Wireless for email (supposedly secure).

As for software, there are numerous packages that can decode Sitor A/B - see this site;

If the 735 has a general coverage receiver in it, that will do nicely. You need a good receiver with selectivity and the ability to hear SSB without drifting all over the place. Of course, with today's propagation conditions (cruddy) no matter what you use, a good antenna is an absolute must.

73s Mike
links editor, Utility Monitoring Central
HF Forum moderator, RadioReference
Friends don't let friends buy Scancat Lite Plus!

Last edited by ka3jjz; 09-04-2007 at 5:52 PM..
Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -5. The time now is 2:29 AM.

Powered by vBulletin® Version 3.8.2
Copyright ©2000 - 2015, vBulletin Solutions, Inc.
All information here is Copyright 2012 by LLC and Lindsay C. Blanton III.Ad Management by RedTyger
Copyright 2015 by LLC Privacy Policy  |  Terms and Conditions