The Su-22UM3K is a two-seat training fighter produced during the Soviet period. It was developed based on the Su-22 series. According to the search results, the Su-22UM3K is similar to the Su-22M3K. They are both export models of the Su-17 "Assembler" G and are equipped with P-29B engines. This aircraft has combat capabilities, and the vertical tail has been modified to make it narrower and taller, with a straight top; the ventral fin is shorter and detachable; only the right side is equipped with a machine gun; and it is also equipped with a laser seeker. The Polish Air Force received 20 Su-22UM3K two-seat trainer aircraft, which were acquired as part of the Warsaw Pact membership in 1984. The 40th Squadron of the 1st Tactical Wing of the Polish Air Force is still composed entirely of Su-22 fighters, including Su-22M4K fighter-bombers and Su-22UM3K trainer aircraft. Poland had planned to retire these aircraft in 2016, but since there were no new fighter aircraft to replace them, it modernized the Su-22M4 to extend its service life to 2024 to 2026, and planned to use the F-35A purchased from the United States. After the arrival of the fighters, these Su-22M4s were withdrawn from active service. As a training aircraft, the Su-22UM3K plays an important role in training pilots and conducting combat training. Although this aircraft is relatively old, in some countries, such as Vietnam, Su-22 series aircraft are still in service and participate in training exercises. However, there are also reports that these aircraft have had accidents during training, such as the 2015 incident in which two Vietnamese Su-22 fighter jets collided and crashed in the air during a training exercise in the South China Sea.