That’s what I was wondering...I look it up periodically. There were some bursty transmissions that I did not recall is all.
There is another Russian fixed HF net colloquially known as “The Pip” on 3576 khz (night time, Moscow time) and 5448 (daytime Moscow time). It is supposed to become active in case of major mobilization.
Russian blogs say it belongs to the Southern Military District. May be of interest.
No problem copying 5448 on the east coast. For the 3576 you need a good RX antenna. It is smack in the middle of the 80m ham band.