A full featured program that decodes and displays NAVTEX and SITOR-B maritime transmissions on shortwave radio, available for macOS and Windows.
Works great with SDR software and virtual audio cables! Run up to 8 NAVTEX SITOR-B decoders in parallel at the same time, each tuned to a different frequency.
Black Cat NAVTEX SITOR-B is available for download and trial prior to purchase, so you can make sure it works correctly with your setup. It's available for Windows 8 10, and 11 (Windows 7 is not supported) as well as macOS.
Download a copy here:
https://www.blackcatsystems.com/software/black_cat_navtex_sitor_b_decoder.html