SLF
Having operated and maintained Russian SAM systems I can answer that question. Very simply anybody who has had some simple training in operating the system can engage a non maneuvering high altitude target as the system has a high level of automation built in. It was designed to be operated by conscript / reservist crew with minimal operational training (I learn the basic operation of a Russian system from running it up to engaging a non jamming target in a day!). What was the operator seeing and thinking?
He saw a blip on the system search radar within the engagement zone of the equipment.
He was under orders to engage any aircraft that came within the engagement zone of his system.
He didn't know or didn't care that there was an airway within the airspace above his missile system (nor were his commanders).
He engaged the aircraft and shot it down. He didn't know what he was shooting at, but he thought it was an enemy aircraft.
Last edited by MAINJAFAD; 18th Jul 2014 at 13:00.