Taking an SA-8 and making it not mobile, makes no sense.
Maybe they ran out of SA-3 missiles, so put SA-8 missiles on an SA-3 launch site?
This "invention" is from Ashuluk firing range, AFAIK. It is used to fire the Saman target drones, which are modified 9M33 Osa missiles. The Neva's launcher is used because it is normally used to fire the Pischal target drones, which are modified 5V27's.
