SailMail South Dayton, FL :

 

this is how it sounds like (Martin Foltz, 2010)

from 2010, here is a QSL received by Martin Foltz

 

here's the latest from their homepage

 

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Callsigns:
WPUC469

 

Frequencies Radioteletype:
2632.4
2806.4
5818
5897.4
7968
8009.4
10215
10366.4
13921.4
18381.4
18490
22895
22961.4

 

Systems used:
PACTOR