Ukraine Modernized air defense system Shilka 23-4M-A1

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Ukrainian troops received modernized ZSU-23-4M-A1 self-propelled anti-aircraft guns from volunteers. The Shilka air defense system was produced in the USSR from 1964 to 1982; it is currently used in limited numbers by the Russian army to counter certain types of UAVs. The ZSU-23-4M Shilka self-propelled anti-aircraft guns were upgraded to the ZSU-23-4M-A1 standard. The repair and upgrade cost $8 million. The ZSU-23-4M-A1 modification completed its first trials in 2019 and was approved for trial operation. The ZSU-23-4M-A1 features new Rokach-AS radars, a digital fire control system, a navigation system, and improved electrical and auxiliary equipment. The new radar is capable of detecting and tracking drones at a range of up to 9 km. The upgrade reduced target acquisition time from 18 to 0.2 seconds. The number of tracked targets increased from 1 to 20. It's worth noting that the upgraded Shilka air defense system can effectively counter large drones.