If the ACR6 was off, Eureka homing avoided too much chat on R/T for VDF, and fed nicely into BABS for an MDH (I don't think we called it that then) of 300ft, the same as an ACR7 approach. The trick was getting the drift right in the descent so that you didn't find yourself steaming through the C/L in the turn inbound, and it was as good as anything else that was available then. As to range, AFAIR Malta was good for 200nm.