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