EAMs

[SA_tx_88116]

I know eams are broadcasted on the shortwave but I’ve also seen them on 311.000 MHz I don’t know why though and are they sent out using AFSATCOM, also what’s the difference between an EAM and a skyking message and what actions do they authorize.

 

[N1XDS]

I know eams are broadcasted on the shortwave but I’ve also seen them on 311.000 MHz I don’t know why though and are they sent out using AFSATCOM, also what’s the difference between an EAM and a skyking message and what actions do they authorize.

• EAMs
  These messages are a specialized skill that involves quickly communicating important information during emergencies, such as sending urgent messages to government officials or military personnel. EAMs can be transmitted using specialized communication systems, such as computers or radios. The DIRECT Messaging System is one secure system that can be used to create, send, receive, and process EAMs.
• Skyking messages
  Also known as "Foxtrot Broadcasts", these messages are time-sensitive and have a higher priority than EAMs, containing code for orders that need immediate attention. Skyking messages can interrupt EAMs if necessary. They are encrypted using a one-time pad, making them impossible to decrypt.

 

[N9JCQ]

You will hear them on 311.00 and 321.00 as well

 

[SA_tx_88116]

And are they SATCOM?

 

[N1XDS]

And are they SATCOM?

Yes over MILSTAR and AEHF

 

[SA_tx_88116]

Unrelated to this I’m getting some clear traffic on ISR channel 14 399.975 sounds like 2 guys talking I got a decent signal some guy was talking about cool glasses probably pirates it also says this channel is now DOD satellite band

 

[reconrider8]

Where do you guys point your antennas at for these comms?

 

[SA_tx_88116]

I have no SATCOM equipment at all just a 16 inch metal whip on my sds100 the signal completely dropped out so that was probably some pirate stuff

 

[jbsarandolphmonitor]

I also heard eams on 323.800 MHz.

Don

 

[N3CI]

I am assuming these 300 mhz signals are FM?

 

[jbsarandolphmonitor]

Mode is AM

don

 

[N3CI]

Thanks.

 

[N1XDS]

For anyone who is looking into listening on Military frequencies here you go if you haven't scan these frequencies.

I am not affiliated with the website below so the credit goes to the author that updates the pdf file.

- Jamie

Military frequencies

 

[dlwtrunked]

You will hear them on 311.00 and 321.00 as well

The 321.000 MHz (sent simultaneous to 311.000 MHz) changed to 323.8 MHz some years ago.

 

[dlwtrunked]

I know eams are broadcasted on the shortwave but I’ve also seen them on 311.000 MHz I don’t know why though and are they sent out using AFSATCOM, also what’s the difference between an EAM and a skyking message and what actions do they authorize.

The were sent digitally (ASCII) decades ago (243.7 MHz at 75 Bd) on the UHF AFSATCOM but that was terminated decades ago. They still use SHF satellites though (no further info). And they are transmitted at 50 Bd/50 Hz shift Baudot teletype by USN TACAMO aircraft at times (commonly on 17.7, 22.7, or 27.2 kHz but other have been used). All are the same message as the HF and UHF voice. And they are certainly transmitted by other un-identified means.

 

[dlwtrunked]

The were sent digitally (ASCII) decades ago (243.7 MHz at 75 Bd) on the UHF AFSATCOM but that was terminated decades ago. They still use SHF satellites though (no further info). And they are transmitted at 50 Bd/50 Hz shift Baudot teletype by USN TACAMO aircraft at times (commonly on 17.7, 22.7, or 27.2 kHz but other have been used). All are the same message as the HF and UHF voice. And they are certainly transmitted by other un-identified means.

Correctiontypo) 17.7 above was meant to be 17.8.