What Defcon Sounds Like: Skyking Emergency Action Messages (2016)
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General Curtis LeMay, known in the Air Force as father of USAF Strategic Air Command



General Jack D. Ripper, “fictional” character, Commie-hater, and preserver of “precious bodily fluids”

Map showing locations of High Frequency Global Communication System transmitter stations



Pamphlet explaining Skyking EAMs to USAF radio operators


PLZT (Polarized Lead Zirconium Titanate) flash blindness goggles protect B-52H and B-2A pilots from temporary blindness due to a nuclear detonation flash.

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Skying, Skying, do not answer…




The
USAF High Frequency Global Communication System (HFGS) is a broadcast
and receiving network comprised of 14 high frequency radio command and
control centers around the world.  One purpose of the High Frequency
Global Communication System is to communicate encrypted orders to USAF
flight teams in the case of the enactment of the Single Integrated
Operational Plan (SIOP).  The SIOP, developed by the USAF Strategic Air
Command (SAC) under the leadership of General Curtis LeMay, was the
United States’ plan for nuclear war from 1961-2003.  

Information
is relayed to flight crews in the form of and Emergency Action Message
(EAM). An EAM is a pre-formatted message that directs nuclear capable
forces to do… something.  The messages are simply a series of letters,
relayed in NATO phonetics, and encrypted with a one-time cypher. The
receiver would need a code book (by varying reports refreshed daily,
weekly, or monthly and inches thick) to identify the key and decrypt the
message.  

The specific EAMs we will be listening to on this show are called Skyking messages.

The
format of these messages is always the same. Salutation, trigraph,
timestamp, authentication, and then a series of letters comprising the
coded message.

For example:

Skyking, Skyking, do not answer.


Message follows.


Papa Tango Three. Time three five. Authentication Whiskey November. Quebec, Juliett, Sierra, Zulu, Foxtrot, X-Ray, Echo…





The
content of these cryptic missives will likely remain so, and the
content of tonight’s show will likely create more questions than
answers. But there are some knowns we can consider. ‘Skyking’ is the
callsign for all active units in the SIOP.  Probably meaning squadrons
of B-52s. ‘Do not answer’ instructs flight crews not to respond and
give away their position. So these messages are tests of the US nuclear
defense system, likely providing target information to aircrews (let’s
think of them as nuclear delivery systems) already aloft, else they
would not need to use HF radio to communicate.  

The thing that
makes these Skyking messages a matter of intense speculation in the
community of radio monitors is that they are still being broadcast
daily.  The SIOP terminated in 2003.  The Cold War is long over, the US
has developed a diplomatic strategy to deal with nuclear proliferation,
and national security fears are focused upon the threats created by
rouge states and terrorism.

The US does not still have nuclear armed
bombers aloft at all times, waiting for the radio message that might end
the world, does it?  Let’s hope not. Though, after pausing to think
for a moment about what else the US military might be doing with a
high-frequency radio command and control structure set up to withstand
an EMP pulse or nuclear first strike, maybe it’s best to stop worrying
and learn to love the bomb.

Background courtesy of the National
Security Archives at George Washington University, the Monitoring Times ,
and my father’s anecdotes of his time with the 117th Air Refueling
Squadron.


Broadcast date: March 22nd 2016


KCHUNG Los Angeles 1630AM


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