At least since 1997 this simplex network with NCS (Net Control Station) RAL2 and many stations is active on many frequencies. The net structure is a Guided Star (stations do not call other stations).
Some of the frequencies are shared with CIS Navy networks, but only in December 2009 I heard RAL2 calling RLM2 on 4051 kHz immediately after the "P" beacon of Navy HQ Kaliningrad stopped. As this frequency is regularly used by Kaliningrad and RAL2, we may assume RAL2 is a CIS Navy network.
The purpose of RAL2 is not clear however; so far I heard
- radio checks with many stations, normally ended with: "ZNN sk sk"
- requests of RAL2 for encrypted voice traffic in MS-5 mode on another frequency
- radio checks on a series of frequencies within a short time, possibly tests of propagation conditions for future use of frequencies.

It seems RAL2 is not a training network nor is it used to send "real messages"; RAL2 may be operated by Moscow and I think the stations are not mobile units....but who knows? Direction Finding is a difficult task - the text always is very short and RAL2 shows up rarely.

The following callsigns and frequencies belong to RAL2: