A PA31 PLT WAS SUPPOSED TO BE ON A 150 DEG HDG; DEPARTING CLT BUT CLAIMS THAT HE NEVER RECEIVED IT.

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MY CLRNC FROM CHARLOTTE CLRNC DELIVERY WAS TO THE PITT-GREENVILLE ARPT; HUGH 5 DEP; GIPPR TRANSITION; AS FILED. CLB AND MAINTAIN 4000 FT. DEP CTL FREQ 124.0; WITH XPONDER CODE. AFTER RPTING READY FOR TKOF; RWY 18L; TXWY A; I WAS CLRED FOR TKOF WITH WHAT I UNDERSTOOD TO BE APPROX THE FOLLOWING TERMINOLOGY: L TURN AFTER TKOF; CLRED FOR TKOF RWY 18L AT INTXN A; REMAIN S OF RWY 23. I INTERPRETED THIS CLRNC TO MEAN; AFTER TKOF MAKE L TURN TO AN ON-COURSE HDG; BUT INSURE MY TRACK REMAINS S OF RWY 23. AT THE MOMENT; THAT STATEMENT SOUNDED INAPPROPRIATE FOR AN IFR CLRNC; BUT I JUST ACCEPTED IT WITHOUT QUESTION. AFTER TKOF; I SLOWLY TURNED THE ACFT TO A HDG OF 095 DEGS; EXPECTING TO RECEIVE A VECTOR FROM DEP TO INTERCEPT THE GIPPR TRANSITION. INSTEAD; THE CTLR ASKED WHAT HDG I WAS ASSIGNED. I INFORMED HIM THAT I WAS NOT GIVEN A SPECIFIC HDG AND REPEATED MY TKOF CLRNC. HE INFORMED ME TO TURN TO A HDG OF 150 DEGS; WHICH HE SAID TWR SHOULD HAVE ASSIGNED. A FEW MOMENTS LATER; HE STATED THAT THE TWR CTLR STATED HE ISSUED A HDG OF 150 DEGS AND THAT THE HOLD S OF RWY 23 WARNING WAS TO REMAIN S OF THE RWY 23 IN SETTING UP FOR TKOF. I TOLD THE CTLR I WAS CONFIDENT THAT I WAS NOT ISSUED A SPECIFIC HDG. THAT TERMINATED THE DISCUSSION. AFTER REVIEWING THE DEP PROC AND RECALLING MY PAST EXPERIENCES AT CHARLOTTE; I SHOULD HAVE RECEIVED SOME HDG CLRNC; WHETHER IT WAS MAINTAIN RWY HDG OR A SPECIFIC HDG. I SHOULD HAVE QUERIED THE LCL CTLR FOR A SPECIFIC HDG. I DO NOT KNOW WHY I DIDN'T; BUT CAN ONLY ASSUME I WAS COMPLACENT WITH THE DEP PROC SINCE I HAVE MADE MANY RECENT DEPS FROM CHARLOTTE ARPT WITHIN THE LAST 6 MONTHS. IT IS ALSO POSSIBLE THAT I MAY HAVE BEEN DISTR WITH COMPLETING A CHKLIST PROC WHEN THE TKOF CLRNC WAS ISSUED AND MISSED THE HDG. HOWEVER; EVEN IF THE CTLR DIDN'T ISSUE A HDG; I SHOULD HAVE QUESTIONED HIM. CORRECTIVE ACTION: AS A SINGLE PLT; REVIEW THE DEP PROC EACH DEP; REGARDLESS OF THE FREQ OF USE. ADDITIONALLY; I BELIEVE A DIFFERENT USE OF CLRNC TERMINOLOGY MAY HAVE ELIMINATED MY CONFUSION WITH THE REMAIN S OF RWY 23 STATEMENT. RECOMMEND CTLR STATE INSTEAD 'REMAIN S OF RWY 23 FOR TKOF.'