[MilCom] MIL: 11175.0 USB - Exercise: BLUE CHIP; TREASURER; WINGBONE; CATHEDRAL; GUNMETAL and PROXIMATE

[Jeff Haverlah]

0740z 29 Apr 25

The obvious exercise remains active well into 29 April 25.

28 Apr 25 UTC:

2236z BAD ALIBI (NCS HFGCS) broadcasts 30 character EAM 4AXIFJ. This string
remained active in their message queues for 8 hours. During this event all
their 4A strings remain active for many hours in their traffic queues.

29 Apr 25 UTC:

0017z: FROG 74 launches from TRAVIS and flies to the Pacific. He is
apparently replacing DOING 67 as TACAMO PAC.

0546z TREASURER (NCS HFGCS) broadcast the 30 character EAM 4AFZ44.

WINGBONE (believed to be FROG 74) worked TREASURER at 0026z and entered the
net at 0030z.

CATHEDRAL: TACAMO PAC. His 0020z restoral rebroadcast is believed to be
from DOING 67 (HEDGEROW/CATHEDRAL); painful audio with loud feedback
squeals.  From the 0050z restoral rebroadcast the player is believed to be
FROG 74; and WINGBONE became CATHEDRAL. CATHEDRAL remains active at 0720z
with rebroadcasts of 4AFZ44 (4AXIFJ expired around 0610z).

PROXIMATE: Called TREASURER at 0452z+ apparently to exit the net. Suspected
to be DOING 67 (HEDGEROW/CATHEDRAL) approaching OFFUTT at the time.

0533z PELA 70 launched from PAX RIVER and flew to the Atlantic. TACAMO LANT.

GUNMETAL: TACAMO LANT. 0559z GUN METAL rebroadcast 4AFZ44. From that point
GUNMETAL rebroadcast 4AFZ44 at the TACAMO LANT h+10/h+40 restoral windows.
He remains active at 0740z.

0706z TREASURER: 30 character EAM 4ADLHF.  CATHEDRAL rebroadcast the string
at 0711z.

17.8 KHz VLF FSK has been active with at least two EAM strings since 0630z.

GUN METAL's restoral rebroadcasts are being heard at weak but readable
levels on the UTwente SDR on 11175.0 and are probably readable on other
receivers as well in western Europe.

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