B757 ACFT RPTR FLC STATES THAT B747 WAS NOT IN COMPLIANCE WITH SFO VISUAL FLT PROCS. HVY ACFT ARE NOT SUPPOSED TO OVERTAKE ANOTHER ACFT LNDG ON PARALLEL RWY.

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I WAS THE CAPT OF FLT; A B757; INTO SFO ON JUN/XX/97. THE WX WAS VFR. WE WERE CLRED FOR THE FMS BRIDGE VISUAL APCH TO RWY 28R. TFC WAS POINTED OUT IN OUR 12 O'CLOCK POS AS A B747 THAT WAS TO FOLLOW US ON A VISUAL APCH TO RWY 28L. AS WE APCHED THE SAN MATEO BRIDGE (SAMUL); THE CARGO B747 ROLLED OUT LESS THAN 1 MI BEHIND US AND SLIGHTLY TO OUR L. THE B747 GRADUALLY OVERTOOK US AND PASSED US AT APPROX 500 FT AGL; LNDG SEVERAL SECONDS AHEAD OF US. I FEEL THAT THIS IS AN EXTREMELY HAZARDOUS SIT. FIRST; THE B747 DID NOT MAINTAIN THE REQUIRED 4 MI WAKE TURB SEPARATION BEHIND US; A B757. SECOND; THE B747 PUT US INTO A HAZARDOUS WAKE TURB SIT AS HE PASSED US. AND THIRD; AT WINGTIP TO WINGTIP; THIS IS TANTAMOUNT TO FLYING FORMATION WITHOUT A BRIEFING. FURTHER; COMMERCIAL CHART PAGE 13-2A; 'SFO INTL ARPT EXPANDED CHARTED VISUAL FLT PROCS;' SPECIFICALLY STATES; 'HVY ACFT WILL NOT BE AUTH TO OVERTAKE ANOTHER ACFT ON THE ADJACENT FINAL APCH COURSE; WAKE TURB CAUTIONARY ADVISORIES WILL BE ISSUED; AS APPROPRIATE.' WE WERE OVERTAKEN AND PASSED BY A B747; AND NO WAKE TURB ADVISORIES WERE ISSUED TO US. IN RETROSPECT; A GAR MIGHT HAVE BEEN IN ORDER; BUT A SIMULTANEOUS GAR BY THE OVERTAKING ACFT; AS EXPECTED AND REQUIRED; WOULD HAVE CREATED AN EVEN MORE HAZARDOUS SIT. THIS WHOLE PROC CREATES A POTENTIAL DISASTER!