[MilCom] MIL: 11175.0 USB - GRANVILLE and TRINITY; message traffic with zeros, ones, eights and nines

Jeff Haverlah jehaverlah at gmail.com
Tue Jun 10 20:57:16 EDT 2025


0053z 11 Jun 25

UTC 10 Jun 25

The UTC day has been very busy.

Something extremely (with emphasis on extremely) rare on the HFGCS.

There are no zeros, ones, eights or nines in EAM strings, unless there are.
The exceptions are extremely rare.

Such as today (UTC 10 Jun 25):

All 11175.0:

1915z: GRANVILLE (NCS HFGCS) called and raised TRINITY (unknown player;
suspect ground) for a signal/connectivity check.

1920z: GRANVILLE: This is a test; this is a test; "TRINITY; TRINITY; this
is GRANVILLE; break; FWDE3Z

FWDE3ZJ7HTRXCBZF(ONE)3E(NINE)G5ZOC3O(ZERO)RP

1930z: GRANVILLE; BWTXP4.

BWTXP4(ONE)ZS25GX6(NINE)H(NINE)CX6KRP(EIGHT)YMHF(ONE)Y

1940z: GRANVILLE; BWTXP4; 33 characters.

BWTXP4(ONE)ZA25FZ6(NINE)H(NINE)CX6KRP8YMHF(ONE)YXYZ
(the XYZ at the end are the 3 additional characters.)

(At least they called one of them a "test." No known very rare examples in
the past have been prefaced with "test.")

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