[MilCom] MIL: 11175.0 USB - DUCKBOARD

[Jeff Haverlah]

0354z 02 Sep 25

UTC 01 Sep 25

A very quiet day during a major U.S. 3-day weekend (Labor Day).

0100z: MAINSAIL with test count.

11175.0 had WEFAX activity dominating the frequency in the western half of
the United States and at least noticeable throughout most of the rest of
CONUS. Lengthy sessions ended at 0409z with short sessions following
throughout the CONUS night, apparently ending at 1209z. KiwiSDRs in the
Mississippi Valley and Midwest were able to produce usable FAX images from
the signal.

0534z: MAINSAIL with test count between the sessions of WEFAX transmissions.

[No HF message traffic since 1435z 31 Aug 25.]
[Two hour message traffic window follows.}
========
1354z: DUCKBOARD (NCS); 77GTD7; 22 characters; P4.
77GTD7JSQLUPFVNWNNRFT7

1403z: DUCKBOARD; 77E3ZX; 41 characters; P4.
77E3ZX2RZJX7VSVVI7D3ETTBVFIEDJRLRRZEBMEKO
[Very rare character count in this series of EAMs.]

1515z: DUCKBOARD; XTXHPU; P1.
XTXHPURJQBWBCLEAPTYDRV5RVNX5UK

1530z: DUCKBOARD; XTXHPU; h+00/h+30 NCS/ABNCP/Gulf restoral rebroadcast
window.

1536z: DUCKBOARD; XTOSPN; P1,
XTOSPNVBR4O7L73STTOQSRCSID7EXB

1549z: DUCKBOARD; XTN5PX; P1.
XTN5PXT4TEQ6YO7EHOEDJGBFLPVJ4D
========
[End of logged HF message traffic for this UTC day. This fits the holiday
weekend traffic pattern of the previous 2 days.]

1721z: MAINSAIL with test count.
1722z: DIEGO GARCIA with test count (11175 UTwente SDR).
1734z: DUCKBOARD with test count (weak UTwente SDR).

2157z: DUCKBOARD with test count.

Jeff
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Jeff Haverlah               Coastal Texas
     Airspy HF+ Discovery   W6LVP loop  Various web SDRs
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