At the Polish People's Republic Chojna airport, between 1973 and 1991, the MiG-21SMT Fishbed-K type was flown for 19 years. In the seventies, the 582th Fighter Air Regiment used the type for tactical fighter tasks. At the end of the seventies, the MiG-21SMT Fishbed-K type received camouflage paint.
In the eighties, three squadrons of the regiment used two different sub-variants. One squadron used the humpback larger saddle tank variant (Izdeliye 50), while two squadrons used the smaller saddle tank variant(Izdeliye 50bis). They were externally indistinguishable from the MiG-21bis Fishbed-L.