Zap Codes @ BATUS

In simple terms, what is the purpose of the ‘zap code’ on a military vehicle on exercise at BATUS?

Thanks,

Paul

The numbers relate to range control, knowing what vehicles are on the range, and where they are , by two different methods,
one is a vehicle fitted device, and if that is not picked up,
a lockstat, by radio on the range network, which you also do personal on the area by as well.