Heard at the Shack on the Bayou in southeast Texas:

0140, November 12 UTC
350 kHz
"GDT"

The keying sounds kind of sloppy, but I'm pretty sure it's "GDT".

It's not in any reference I can find.

Has anybody heard it?

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Registered Monitor BR549
The Shack on the Bayou- http://www.ghg.net/cliffwatts/

Drake R8, Sony ICF-SW100, Heathkit GR-64 (retired)
Realistic Pro-2006, Bearcat BC-245XLT