FLT CREW OF C750 ADVISED BY SCT CTLR THAT THEIR DEP PATH FROM SMO CAUSED A POTENTIAL CONFLICT WITH DEPS FROM THE N COMPLEX AT LAX.

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ON AN IFR FLT FROM SMO TO SAN WE WERE GIVEN THE FOLLOWING CLRNC FROM SMO GND CTLR. 'FLY RWY HEADING TO THE LAX 310 DEG RADIAL; TURN R TO 250 DEG RADAR VECTORS TO JOIN THE LAX 118 DEGS TO MZB 320 DEGS; MZB DIRECT SAN; MAINTAIN 3000 FT EXPECT 11000 FT IN 5 MINS.' PRIOR TO TKOF THE CAPT AND I BOTH TUNED OUR RESPECTIVE VORS TO THE LAX 310 DEG RADIAL FOR THE TURN. WE TOOK OFF AND WHEN THE CDI CTRED ON THE 310 DEG RADIAL FROM LAX; WE TURNED TO THE HEADING ASSIGNED IN THE CLRNC. THE TURN WAS AT STANDARD RATE AS COMMANDED BY THE FLT DIRECTOR. WHEN WE LANDED IN SAN; WE WERE TOLD BY THE GND CTLR TO CALL SOCAL APCH; WHO HAD A QUESTION FOR US. THE SOCAL CTLR ADVISED THAT OUR TURN WAS TOO LATE AND A TFC CONFLICT COULD HAVE HAPPENED. WE FLEW THE DEP AS CLRED AND TURNED AS INSTRUCTED; SO I'M NOT SURE WHAT ELSE WE COULD HAVE DONE TO AVOID THIS AGAIN; GIVEN THE SAME CLRNC. SUPPLEMENTAL INFO FROM ACN 589295: THE FEELING I GET WHEN TALKING WITH OTHER PLTS IS THAT THE TURN SHOULD BE STARTED PRIOR TO REACHING THE LAX 310 DEG RADIAL. IF A MORE SPECIFIC CLRNC COULD BE GIVEN BY GND CTL OR AN FMS DEP PROC DEVELOPED THIS WOULD REDUCE ANY AMBIGUITY THAT MAY EXIST WITH PRESENT CLRNCS. CONTINUATION OF ACN 589293: HOWEVER SINCE THE 310 DEG RADIAL IS ON THE EDGE OF THE LAX CLASS B AIRSPACE; I FEEL THAT ATC; AND THE COMPANY SHOULD WORK TOGETHER TO COME UP WITH A BETTER DEP. A TURN TO 250 DEGS XING THE LAX 311 DEG RADIAL; BUT PRIOR TO THE 310 DEG RADIAL; SHOULD SOLVE THE PROB. ALSO; ATC SHOULD UNDERSTAND THAT NOT ALL ACFT HAVE THE SAME TURNING RADIUS AT STANDARD RATE (SPD VARYING); ALSO SHOULD KEEP THIS IN MIND WHEN WORKING ACFT; SO CLOSE TO CRITICAL AIRSPACE BOUNDARIES. ANOTHER SOLUTION MIGHT BE TO FLY THE DEP AT A SLOWER SPD AND TURN AT AN ANGLE GREATER THAN STANDARD RATE (NOT THE SAFEST OPTION; OR FEASIBLE). I DO KNOW THAT THERE ARE QUITE A FEW POLITICAL ISSUES INVOLVED HERE AS WELL; IN REGARDS TO THE NOISE FACTOR AT SMO.