CVG CTLR DESCRIBED ACR NAV ERROR ON DEP AND INDICATED THAT THIS ACR HAD PREVIOUSLY HAD THE SAME NAV PROB UTILIZING WAYPOINTS.

Narrative

CRJ2; ON IFR FLT FROM CVG TO MSP; FILED WHWTR4.CADIZ; AND POINTS BEYOND. HE CHKED IN CLBING TO 6000 FT. I INSTRUCTED HIM TO FLY THE TWR ASSIGNED HDG AND JOIN THE WHWTR4 DEP (RWY HDG UNTIL INTERCEPTING THE CVG 294 DEG RADIAL); CLB TO 13000 FT. HE RESPONDED CORRECTLY. I NOTICED HE HAD TAKEN A 294 DEG HDG OFF THE ARPT. WHEN HE WAS CLBING THROUGH ABOUT 4500 FT; I SAID I SHOWED HIM ABOUT 3 MI OFFSET N OF THE DEP; AND ASKED HIM IF HE SHOWED ON THE TRACK; AND HE RESPONDED THAT HE WAS. I TURNED HIM TO A 270 DEG HDG TO GET HIM BACK TOWARD THE PROPER COURSE. WORKLOAD WAS LIGHT; SO I DISCUSSED WHAT THE FMS SHOWED HIS RTE; AND HE CONFIRMED IT. THE TRACK HE TOOK PUT HIM IN DIRECT CONFLICTION WITH CVG INBOUNDS ON THE TARNE ARR. WE DISCUSSED THE SIT AND I ADVISED HIM THAT THIS ISN'T THE FIRST TIME ACR X ACFT HAVE DONE THIS; AND ASKED HIM TO ALERT HIS OPS TO THIS SIT; SINCE THE CHANCE OF HEAD-TO-HEAD CONFLICTION WITH INBOUND TFC IN MEDIUM OR HIGH CTLR WORKLOADS IS INCREASED. AGAIN; THIS IS NOT THE FIRST TIME ACR X ACFT HAVE DONE THIS; AND THROUGH OTHER DISCUSSIONS WITH CVG'S PRIMARY USERS; ACR Y AND ACR Z; THEY HAVE SAID THEY GET THEIR DATA FROM THE SAME PLACE; SO IT MUST JUST BE FAMILIARITY WITH THE PROC. ACR X NEEDS TO BE AWARE OF THIS SIT AND CHK THEIR FMS DATA TO ENSURE THEY PICK UP THE RADIAL OFF THE VOR; NOT THE ARPT! CALLBACK CONVERSATION WITH REPORTER REVEALED THE FOLLOWING INFO: THE REPORTER INDICATED THAT HE HAS NOT OBSERVED THE PROB RECENTLY AND THAT HE FORWARDED THE INFO TO BOTH ATC MANAGEMENT AND TO THE ACR REPS.