Tag Archives: Utility

Aeronautical HF Radio Map

MapasconFrecuenciasAereas

Many thanks to Craig Fuller who shared this excellent Aeronautical HF radio map on the Shortwave Listeners Global Facebook page.

Click here or here to download the map as a large graphic.

Note that this map is 13 years old and somewhat out-of-date.  Paul Jones kindly posted some frequency updates to the Shortwave Listeners Global Facebook page:

Confirmed SHANWICK QRG’s.
(Shanwick = Shannon/Prestwick)
Clearance Delivery
123.950Mhz
127.650Mhz
135.525Mhz

Southern Routes
3016 HF
5598 HF
8906 HF
13306 HF
17946 HF

Family ‘B’Central & Northern Routes
2899 HF
5616 HF
8864 HF
11279 HF
13291 HF
17946 HF

Family ‘C’ Central & Northern Routes
2872 HF
5649 HF
8879 HF
11336 HF
13306 HF
17946 HF

Family ‘D’ Central & Northern Routes
2971 HF
4675 HF
8891 HF
11279 HF
13291 HF
17946 HF

Family ‘F’ Central & Northern Routes
3476 HF
6622 HF
8831 HF
13291 HF
17946 HF

Shanwick VHF 127.900 Mhz

EMERGENCY 121.500 MHz

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Shortwave Radio Recordings: EAM messages

StrategicAirCommand

Inspired by SWLing Post reader @K7al_L3afta, a few weeks ago, I monitored 15,016 kHz for US Air Force EAM (Emergency Action Messages).

I’m no expert on military communications, but I did manage to catch a few messages–that I assume are EAM(?)–on the same frequency.

All of these recordings were made on the afternoon of February 15, 2015 on 15,160 kHz in the upper sideband:

Recording 1

Recording 2

Recording 3

Recording 4

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Catching a USAF HF-GCS transmission in Morocco

My buddy, @K7al_L3afta (on Twitter), posted this interesting recording of the US Air Force High Frequency Global Communications System on 15,016 kHz USB at 18:01 UTC yesterday:

HF-GCS-logoI don’t believe I’ve ever heard or noticed this type of USAF HF-GCS transmission before.  Sounds almost like a numbers station.

Update: SWLing Post reader, Daniele, comments:

It’s an EAM, “Emergency Action Message”:

http://en.wikipedia.org/wiki/Emergency_Action_Message

http://mt-milcom.blogspot.it/p/what-is-emergency-action-message-or-eam.html

http://www.monitoringtimes.com/html/eam.html

Thanks, Daniele!

As I’ve mentioned before, @K7al_L3afta lives in an urban area of Morocco and his shortwave radio listening is plagued with radio interference (RFI). Still, he seems to snag some interesting catches on the shortwaves just like this one which he said he caught by “turning the tuning knob randomly.”

Serendipity is, indeed, the best type of SWLing!

You can follow @K7al_L3afta on Twitter by clicking here.

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