How difficult is the ZSU-23-4 to operate compared to the SA-2E/F, SA-3, SA-4 and SA-5?
at my eyes ! you have to faster than sa-2 and other system's operators
because in sa-2 or others you have far way till target maybe
tens KM
but in shilka u can see target only in your scope just from 13 km so !
one target with 1.0 mach speed coming to you and you understand it just from 13 km !