Close enough - as I understand it, NAVTEX has headers on each message that contains date/time stamps and originating station information. A commercial reader can check these timestamps and see if a duplicate message is being received - if it is, it's ignored.
Reading a SITOR-B signal with NAVTEX should work just fine - I'm pretty sure the protocols are the same, with that one slight difference. 73s Mike
 By the way, there's a dedicated MultiPSK Yahoo group now, and Patrick is there quite frequently.
links editor, Utility Monitoring Central
HF Forum moderator, RadioReference
Friends don't let friends buy Scancat Lite Plus!