Polish Civil Defense 3347,9 USB 1238 UTC 24 Jan 2019

[kris]

   Once again, I managed to hit the Polish Civil Defense service. Although we have cellular networks, internet and VHF connectivity on a daily basis, they still use HF.
From 1238 UTC to 1356, one-way messages were broadcast at intervals of around 5 minutes. The structure of messages and used vocabulary were characteristic for the civil defense service.
The leader began each message with the words: uwaga tu Lajkonik tu Lajkonik,
then gave twice the message, for example:
- brzoza czajka fala 3311 - magneto tarka tęcza - alfa alfa drzewo  -  krzak fala 2308 - siarka fala 3311
and so on.
1356 was the last message, this time it did not give information about "the end of the exercise".

[R4002]

Glad to hear the Poles are still using HF for civil defense/emergency management.  Similar frequency choice to the US networks I'm familiar with - 3347.9 kHz USB, a frequency in the 2-5 MHz region for regional MF/HF communications

American emergency management (civil defense) agencies do the same thing, despite Internet connectivity, dedicated secure landline telephone networks and VHF/UHF radio networks, they still do weekly HF radio nets and use HF radio heavily during emergencies.  FEMA, along with several other government agencies, have weekly nets on several frequencies as part of the SECURE network.

These networks include heavy use of the lower frequencies, including 2/3 MHz for the Operation SECURE emergency management/civil defense MF-SSB/HF-SSB radio network.

https://www.hfunderground.com/wiki/index.php/SHARES

https://www.hfunderground.com/wiki/index.php/SECURE

[kris]

FEMA, along with several other government agencies, have weekly nets on several frequencies as part of the SECURE network.

These networks include heavy use of the lower frequencies, including 2/3 MHz for the Operation SECURE emergency management/civil defense MF-SSB/HF-SSB radio network.

    Hello  - Thank you for broadening the topic. For now I have not been able to determine some regularity of broadcasting, but what you have written gives me to think.   
 Like bandplane SECURE HF network, I found channel 5140 and described in my previous thread.
Perhaps we are approaching NATO procedures?

[R4002]

5410 kHz USB is used as an inter-state coordination frequency for emergency management/disaster response purposes in the USA, shared with NATO I would imagine.  It's used for regional communication within the USA as far as the SECURE network goes.