"This is one of the factors that puts a lot of pressure on the ability of the Ukrainian army to carry out certain combat operations," Krivonos said."With the help of electronic warfare systems, the Russian military is cutting off communication between the Ukrainian armed forces and their command, preventing them from "achieving any victories," Krivonos said. Russian electronic warfare systems have proven effective in the area of special operations, as Ukrainian air force fighter planes are regularly forced to abandon their combat missions and return to their bases due to the effectiveness of Russian electronic warfare systems, which turn off their electronics, an informed source told Sputnik.