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Shortwave Data Decoding - Discussions regarding decoding digital signals on the HF bands, including HFDL, ALE, RTTY, CW, and others.

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Old 03-01-2018, 11:44 AM
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Default Sailmail frequencies

Sailmail is one of the many companies that handles email traffic on the high seas. They typically use PACTOR III or IV with Huffman compression and other techniques that make their traffic basically unreadable to anyone not using one of the high-end SCS modems (which has de-facto cornered this portion of the market). However the headers - which contain the station information - are usually readable (sometimes sent in PACTOR I or II) so you can actually know what shore station is involved.

The link below is courtesy of the UDXF. About 1/3 the way down the page is a list of sites, frequencies and callsigns, making this document pretty valuable. It's in a section called 'Sailmail Frequencies'

There's a lot of info here about setting up a station and operating procedures which would be valuable to the mariners amongst us. Enjoy...Mike
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Old 03-01-2018, 12:56 PM
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Very interesting - pity the shore stations don't send an ID every so often - would be very handy propagation indicators world wide.
Cheers - Martin ZL2MC - Palmerston North
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Old 03-02-2018, 12:10 PM
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Great link thanks.....
Brownsville Digital Group A.R.C.
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