I will add one mini fact, after having worked on SCIP/SWIN for many years.

The backbone is a mostly unencrypted HF radio net, between 8 and 20MHz, and IIRC 11.56MHz is the all-stations hailing freq. Since it can be bounced off the ionosphere, you can talk to stations halfway across the globe without a repeater. It is monitored 24x7, with direct comms to military commanders and governors while activated (I.e. during an emergency).

Take from that what you will. It'd be nice to bring in hamfags to hear from them, but HF is way outside the ham bands.

Spez: MHz, not kHz.

I will add one mini fact, after having worked on SCIP/SWIN for many years.

The backbone is a mostly unencrypted HF radio net, between 8 and 20kHz, and IIRC 11.56kHz is the all-stations hailing freq. Since it can be bounced off the ionosphere, you can talk to stations halfway across the globe without a repeater. It is monitored 24x7, with direct comms to military commanders and governors while activated (I.e. during an emergency).

Take from that what you will. It'd be nice to bring in hamfags to hear from them, but HF is way outside the ham bands.