AN ACR B757 CREW RPTS THAT EACH DEP OUT OF SXM IS DIFFERENT AND NONE MATCHES THE ACR'S FMS DEP.

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GIVEN CLRNC AT TKOF; 'WHEN CLR OF MOUNTAINS; L TURN; CLRED FOR TKOF.' WE EXECUTED THE ACR DEP AND; WHEN 2500 FT; MADE A L TURN BACK OVERHEAD PJM. WHEN ALMOST OVERHEAD ARPT; DEP SAID TO INTERCEPT THE 360 DEG RADIAL AND ASKED US OUR POS. SHE SAID WE SHOULD NOT BE IN THE S SECTOR; 'CLB TO FL140 AND RPT PASSING FL060.' SHORTLY THEREAFTER; WE WERE CLRED ON COURSE. WE TURNED TO INTERCEPT B520; WHICH WAS OUR CLRNC. SHORTLY THEREAFTER; WE WERE ASKED OUR POS. WE RPTED PASSING THE 340 DEG RADIAL. WE WERE TOLD TO JOIN THE 340 DEG RADIAL. WE MADE A TIGHT TURN TO JOIN THE 340 DEG RADIAL (WE WERE CONCERNED ABOUT THE 318 DEG RADIAL OUTBOUND VOR RADIAL USED FOR THE APCH INTO SXM). WE SWITCHED TO SJU CTR WHO PICKED US UP ON RADAR AND SAID TO KEEP IT TIGHT TO THE 340 DEG RADIAL. SHORTLY THEREAFTER; WE WERE CLRED ON COURSE AND TO CRUISE ALT. I HAVE FLOWN INTO SXM 2 OTHER TIMES AND THE CAPT 3 TIMES IN THE PAST MONTH. WE HAVE RECEIVED 3 DIFFERENT DEP REQUESTS. TO CLARIFY THE SIT; THE CAPT WALKED TO THE TWR AND SPOKE TO THE CTLR. THEY SPECIFIED THAT; AFTER THE R TURN AFTER TKOF AND WHEN CLR OF THE MOUNTAINS; TO REQUEST A R TURN TO PJM AND PROCEED OUTBOUND ON OUR CLRNC. THEY HAD NO KNOWLEDGE OF OUR FMC PROC. GIVEN THAT INST ARRS WERE BEING USED; IT IS OBVIOUS THAT DEP CTL WAS NOT AWARE OF OUR PROC TO TURN TO 180 DEG HDG AFTER TKOF AS DEP EXPECTED US TO BE N OF THE VOR. THIS OP HAS SOME SAFETY CONCERNS WHEN WX IS MARGINAL. ACR; TWR; AND DEP DO NOT UNDERSTAND EACH OTHER'S PROCS. I BELIEVE FURTHER CLARIFICATION AND MORE INTERFACE WITH SXM TWR AND DEP WOULD BE HELPFUL. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR FLIES THE B757-200 WITH; IN THIS CASE; AN AUGMENTED CREW. HIS ACR HAS A DEP PROC IN THE FMC THAT THE CREWS EXPECT TO USE; BUT EVERY DEP GIVEN BY SXM IS DIFFERENT. THE RPTR HAS HAD 3 DIFFERENT DEP PROCS IN 1 MONTH. HIS CAPT TALKED TO THE ATCT TRYING TO GET AN UNDERSTANDING; BUT THEN THE NEXT DEP WAS NEW. THE CAPT SENT A RPT TO HIS ACR; BUT THE RPTR HAS SEEN NO CHANGE YET.