Croatian MiG-21 bisDs are scrambled on practice interceptions on a weekly basis.

New avionics comprise (1) KFS-564A control unit, (2) SN3500 primary navigation display, (3) GPS 400W, (4) AN/ARC-210 digital radio, here temporarily replaced with TY92 High Power VHF radio, (5) Thommen analogue instrument and (6) TSC 2050 IFF system.

This HRZ MiG-21UMD sports the colours of the Croatian national flag.