[MilCom] MIL: 11175.0 USB - THREE AMP; EGGPLANT; and CHURCHMAN

[Jeff Haverlah]

0006z 22 Jul 26

UTC 21 Jul 26

P1: B7
P2: GP
P4: QL

E6B: CHURCHMAN, apparently Due Regard, active from 1515z through 2208z. No
HF or VLF activity noted from it.

Very rare character count strings at 2057z and 2224z.

[1.5 hour+/- message traffic window.]
========
0002z: THREE AMP (NCS); B7P6WP; P1.
B7P6WPUADK6IP7WCEDMC2ZGQPMEGOY

0005z: THREE AMP; B7P6WP; echo rebroadcast; weak 11175.0 California SDR.

[One hour later.]
0103z: THREE AMP; B7LOUT; P1.
B7LOUTTGGFVSCHFPE6CCUYTKHUVBP7

0111z: THREE AMP; GPW7KX; P2.
GPWK7XRXSW66LROUCINUANZWN2XQIP

0132z: THREE AMP; B7F66J; P1.
B7F66JCGG7OJOWR3HDZOOH2LD245WF

0135z: THREE AMP; B7Q56P; P1.
B7Q56P7X3KJ7Q6CACE7GYPBKK7GWHP
========

[Common traffic window for this activity.]
========
0156z: THREE AMP; B7FPP4; P1.
B7FPP4VDN65BO3VQOCQ3GF6GB7KPAG
[Fed to TACAMO LANT.]

[0210z: 17.8 KHz (LANT) VLF FSK MSK broadcast.]

0210z: EGGPLANT (pre0000z STICKLER); B7FPP4; h+10/h+40 TACAMO LANT restoral
rebroadcast window.
0240z: EGGPLANT; B7FPP4; LANT restoral.
0310z: EGGPLANT; B7FPP4; LANT restoral.
0340z: EGGPLANT; B7FPPR; LANT restoral while over the Atlantic coast
northbound to PAX RIVER.
========

Quiet.

[6 hour+ message traffic window.]
[No logged B7 prefix traffic follows; GP and QL prefixes only.]
========
1411z: THREE AMP; GPXNXH; P1.
GPXNXHUUY2JRKMGNOFBAIFK4XQPSR6

1515z: CHURCHMAN (presumed E6; not visible on ADSB mapping sites) called
MAINSAIL a couple of times with no known response.

1516z: CHURCHMAN called THREE AMP with no known response. Good levels on a
California SDR. Not seen (waterfalls) on central and east coast SDRs. But
see 2202z.

1524z: THREE AMP; QL5EG4; 25 characters; P4.
QL5EG4PYNZTT7L5FLU66YRDAL

1527z: THREE AMP; QLDSWS; 35 characters; P4.
QLSWS5YXPAYICKKZKNA4NOR54NOW54NOZ24

Reformatted for structure:

𝚀𝙻𝚂𝚆𝚂𝟻  [𝙿𝚛𝚎𝚊𝚖𝚋𝚕𝚎; 𝟼]
𝚈𝚇𝙿𝙰𝚈𝙸𝙲𝙺𝙺  [𝟿]
𝚉𝙺𝙽𝙰𝟺  [𝟻]
𝙽𝙾𝚁𝟻𝟺  [𝟻]
𝙽𝙾𝚆𝟻𝟺  [𝟻]
𝙽𝙾𝚉𝟸𝟺  [𝟻]

1534z: THREE AMP; GPGEXD; 39 characters; P2.
GPGEXD6VTVLNZOPMSAYIZ6ZV7CCYR6S5UPGCQV3 (low confidence).

1831z: THREE AMP; GPUBBD; P2.
GPUBBDGJTWTH54TQJSOCLPBJOBL3AV

[Very rare character count traffic follows. Strings under 30 characters in
this prefix series have been associated in the past with TACAMO/sub
activity; however, no HF/VLF activity detected during CONUS work hours.]
********
2057z: THREE AMP; GPTKQN; 28 characters; P2.
GPTKQNBRTKQYT7KZYV6GUUEG2PVT

2202z: CHURCHMAN (see 1515z; 7 hours) called MAINSAIL and THREE AMP,
eventually raising MAINSAIL and exiting the net.
2208z: CHURCHMAN exited the net.
Fair/good levels on southcentral CONUS SDR which might suggest
TINKER/OFFUTT or maybe TRAVIS.

2224z: THREE AMP; GP02A3; 28 characters; P2.
GPO2A3DT7BDOM43GZGCA44A57KUP
********
========

Quiet through 2359z.

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