Soft Maximum - best free downloads
navtex

TrueTTY
... bits), PSK31 (BPSK and QPSK), BPSK63, AMTOR-FEC (SITOR-B, NAVTEX), MultiFSK-16. HF-PACKET and UHF-PACKET (AX25) are supported in KISS-TNC ...

SeaTTY
... transmitted on longwave and shortwave bands in RTTY, NAVTEX and HF-FAX (WEFAX) modes. None additional hardware is required - your ...

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