11175 USB

[Matt285]

Pmdpgp4wwwjj4jhjbbbg.... Kanye out! ? 23:46

[Matt285]

PMDPG4WWWJJ4JHJBBGGG....Katya out! ?23:30

[Josh]

CHAOS 43 comms check with CHAOS 44 @1800Z 09FEB19

CHAOS B-2 509th BW Whiteman AFB MO
CHAOS B-52H 2BW Barksdale AFB LA

[R4002]

On-going EAM from BANK LOAN on 11175 kHz USB (and 13200 USB and other simulcast frequencies) at 1619 UTC

1619 UTC - This is BANK LOAN, out.

[Matt285]

Is this just some civilian sailors talking on HF marine rigs? Any theory on the odd number and letter schemes? Thanks

[R4002]

11175 kHz USB is used by the US Air Force as part of their Global Communications System (HF-GCS).  Other frequencies used as part of this system include 4742 kHz USB, 6712 kHz USB, 6739 kHz USB, 8992 kHz USB, 13200 kHz USB and 15016 kHz USB.  11175 USB is the most active of these frequencies.  There are dozens of other "discrete" frequencies that are also part of the system.  11175 USB is used for Emergency Action Messages (EAMs) and other military communications in USB voice.

So short answer, no, its not fishermen, although they are found all over HF.  It's the US military.  The letter and number scheme are encrypted messages using a One-Time-Pad (OTP) encryption technique to send secure messages to military assets. 

[Matt285]

Thanks R4002. I'm familiar with numbers stations. Hadn't heard of this before now. The tone just seemed very laid back and not very professional compared to other more computer generated even toned voices. Wonder why Ive never seen this in the Spy numbers category?

[R4002]

I can certainly see the argument for putting it in the Spy Numbers section.  However, since 11175 USB (and the other HF-GCS frequencies) are used for two-way communications, telephone patches and other military voice communications its considered a utility network and not a spy numbers station. 

The operators on the HF-GCS will sometimes do some very entertaining things.  They are professionals, though. 

[Josh]

Sometimes hfgcs lights up with honest to gawd spy traffic, when they send a message to one of the elint birds.
https://en.wikipedia.org/wiki/Boeing_RC-135

[Josh]

BINOCULAR with laughing operator, can't keep eam alive @ 1903Z 18FEB19.

[Josh]

RAYMOND 33 calling MAINSAIL @ 1611Z 01MAR19
Raises WEST COAST for radio checks.

RAYMOND 33 28TH BW ELLESWORTH CP



YANKEE 180 calling any station for H radio check 1650Z, raises WEST COAST

YANKEE F-16, Luke AFB AZ
YANKEE C130's CT ANG, 103rd AW Bradley ANGB CT
YANKY KC-130T VMGR-452, Stewart ANGB, NY

[Josh]

FEAR 33 (B-52H 5th BW Minot AFB ND) calling multiple times on triple one for radio check and getting no response. 1822Z 06MAR19

[Josh]

DOOM 82 B-52H 2nd BW, 96th BS, Barksdale AFB, LA calling multiple times on triple one for radio check and getting no response. 2045Z 07MAR19

Eam interrupts DOOM 82 several times.

[R4002]

On-going EAM at 1744 UTC with female operator on 11175 kHz USB.  Good signal on 13200 USB with some echo or long-path QRM.

EIMIHJZS2FC7AX3VP3KTGTMJW5S7JI THIS IS BLUEPRINT OUT at 1746 UTC.

At 1747 UTC, BLUEPRINT (same YL op) came back on with another ALL STATIONS, ALL STATIONS call, same echo/reverb-like QRM in the background (probably due to multipath).

At 1748 UTC, checked 13200 kHz USB and 15016 kHz USB, SIO 444 signals on those two frequencies as well, both exhibit minor multipath/echo QRM but the message is 100% readable.

6712 kHz USB is quiet, can hear something very faint on 6739 kHz USB, nothing on 4724 kHz USB and 8992 has a strong data signal on it with the EAM underneath ()

At 1750 UTC, now male operator "message of 41 characters follows" (I missed the callsign while changing freqs)

Switched back up to 15016 USB at 1751 UTC (15016 kHz seems to have the best signal at the moment)

"Disregard this transmission, this is BLUEPRINT, out" at 1751 UTC.

1752 UTC - a second OM operator "All stations, all stations, this is BLUEPRINT, standby" into authentication sequence then alphanumeric message (on-going at 1753 UTC).  At 1754 UTC "This is BLUEPRINT, out"

[Josh]

Aircraft 29000 (two nine thousand) working ANDREWS with multiple radio checks. 2100Z 08MAR19

https://en.wikipedia.org/wiki/Boeing_VC-25