Su-30 is a two-seat long-range interceptor fighter, first flew in December 1989, and entered service with the Russian air forces in 1992. The Su-30 is created in Irkutsk. Largely based on the Su-27UB two-seat trainer, it's a new radiolocation system which can transmit the positions of 10 targets to four different fighters at the same time.
The Su-30 compares favorably with Su-27UB in respect to the distribution of functions between the crewmen. the main difference is that the workstations in the Su-30 are more similar to each other that clearly distinguishes this fighter from conventional two-seat trainers. Now the rear-seat pilot/operator is able to quickly input the coordinates of the new navigation points into the navigation system and airborne weapons system that is used to intercept targets in a long-range rocket engagement.