The next thing, i want to ask, what was the reason programming the Volhov first and not the Dvina?

Just remember, that Dvina is the "export" version of the Volhov.
Dvina was received by the arab countries, and Vietnam, while Volhov was used by the WarPact, and the Soviet Union.
Dvina was not deployed in Hungary when I started programming, so the first high quality photos were made of the Volhov training complex in 2005.

Than I met the first (and the best tester), who was FCO on Volhov, then Battery commander at a Neva unit.
In 2007 I was able to shot the required shots for NEVA, and the idea of a several system SAM Simulator begun.

In 2009, the first package were released (containing Volhov and Neva), and the English website were created.

In 2010, I had the possibility to take pictures of the KRUG system, allowed by the Hungarian 12. Arrabona SAM regiment.
It was released in the same year.

Before the end of 2010, I had the opportunity to shot the required pictures for the VEGA, and the Shilka sim, at the same day...
... what a day it was!!!


2011, the Vega released, and I had the opportunity to shot finally the Dvina.

So to wrap up, the Dvina was the last system I could spend the required 2~3 hours in it.

Just to decode:
SA-75MK Dvina, SA-2F
S-75M3 Volhov, SA-2E
S-125M Neva, SA-3B
2K11M1 KRUG-M1, SA-4B
S-200VE Vega-E, SA-5B