AN HS125-700 FLC TURNS TO INTERCEPT THE 097 DEG RADIAL OF TUL VOR WHEN THEY WERE SUPPOSED TO MAINTAIN RWY HDG ACCORDING TO THE SID CHART AT TUL; OK.

Narrative

MY COPLT HAD RECEIVED CLRNC TO MYBC ARPT VIA THE TULSA VOR 097 DEG RADIAL TO 45 DME; FROM THERE DIRECT TO LIT VOR; THEN AS FILED; TULSA 5; SQUAWK XXXX. WE INTERPED THE SID AT THE END OF THE CLRNC TO AFFIX ALT AND DEP FREQ HIGHLIGHTED IN BOLD PRINT ON THE TULSA 5 DEP PLATE. THE CLRNC OF INTERCEPTING THE 097 DEG RADIAL FROM TULSA VOR GIVEN BEFORE THE SID SEEMED TO BE AN AMENDMENT TO THE LATERAL GUIDANCE OF THE TULSA 5. AFTER DEP ON RWY 36L; AT APPROX 1000 FT AGL; WE TURNED E TO INTERCEPT THE 097 DEG RADIAL FROM TULSA VOR. UPON CONTACTING DEP; HE INQUIRED AS TO OUR CURRENT HDG. AFTER BEING ASKED IF TULSA TWR HAD ASSIGNED OUR CURRENT HDG AND REPLYING IN THE NEGATIVE; WE WERE TOLD TO CLB IMMEDIATELY FOR TFC TO FL230 AND FLY A HDG OF 090 DEGS (FROM OUR CURRENT 097 DEG HDG). WE RECEIVED A RADIO CALL 2 HRS LATER FROM ZJX WITH A PHONE NUMBER TO CALL (TUL TWR). BOTH OF US PLTS UPON REVIEW OF THE SID PICKED OUT THE HIGHLIGHTED IN BOLD TEXT OF ALT (15000 FT) AND FREQ (120.7). WE FAILED TO CONSIDER THE SID WAS A 'VECTOR' SID AND TO READ 'FLY RWY HDG UNTIL VECTORED TO ASSIGNED RTE' IN SMALL PRINT. REAFFIRMATION BY TWR OF THIS INFO OR ADDITIONAL BOLD TYPE MAY HELP IN CLARITY IN INITIAL PLT ACTIONS UPON DEP.