COMMUTER FLC FLYS APCH AT BFL WHEN RVV (RWY VISUAL VALUE) IS BELOW REQUIRED MINS.

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CAPT WOULD NOT DISCONTINUE THE APCH AFTER BFL APCH TOLD US THAT ANOTHER AIR CARRIER HAD TURNED AROUND; THAT THE RVV WAS 1/4; AND AFTER I TOLD HIM WE SHOULD NOT FLY THE APCH. HE SAID THAT TWR VISIBILITY TAKES PRECEDENCE OVER RVV. I TOLD HIM THAT I DIDN'T THINK SO AND HE SAID THAT HE HAD JUST COVERED IT AT LAST RECURRENT TRAINING. I GOT OUT OPS MANUAL BUT DECIDED IT WASN'T TIME TO BE READING. I KNEW ABOUT LEGAL PREVAILING VISIBILITY AND LEGAL RVR VALUES BUR RVV HAD ME CONFUSED. (I LOOKED IT UP IN THE MANUALS AFTER FLT AND CHART GLOSSARY CLRLY STATES RVV TAKES PRECEDENCE). I AGAIN TOLD CAPT THAT I DIDN'T THINK WE WERE LEGAL BUT THAT IF HE WAS CERTAIN WE WERE LEGAL WE SHOULD CONTINUE. AT THIS POINT I REALIZED THAT IT HAD TURNED INTO A BAD SITUATION. BEFORE JOINING 30R LOC I TOLD HIM WE SHOULD GO BACK TO LAX. AT THE FAF HE CALLED FOR GEAR DOWN; BEFORE LNDG CHK. I TOLD HIM WE SHOULD GO TO LAX. HE PUSHED THE NOSE OVER. I DECIDED THAT IT WASN'T THE TIME TO ARGUE WITH HIM; SO I PUT THE GEAR DOWN AND DID LNDG CHKLIST. I STARTED TO REVIEW IN MY MIND WHAT I NEEDED TO DO TO TAKE OVER CTLS AND FLY THE ACFT. DH IS 690 FT; I DECIDED TO TAKE CTL AT 800 FT. I SAW ALT AT 1000 FT AND CALLED IT. CAPT WENT HEADS UP. I MONITORED ILS AND RWY LIGHTS. I CALLED 'SLIGHTLY LOW' AT 1/2 DOT LOW ON GS AND 'GS' AT 2 DOTS LOW; BUT CAPT WAS CORRECTING BY NOW. WE HAD DRIFTED OVER R SIDE RWY LIGHTS AND I CALLED 'GAR; GAR.' CAPT SAID 'IT'S ALRIGHT' AND THEN TURNED SLIGHTLY AND PULLED OFF A SMOOTH LNDG. WE ROLLED INTO A FOG BANK WHERE WE COULD SEE 2 RWY LIGHTS AHEAD. WE MADE IT TO PARKING OK. WHEN I GOT TO THE HOTEL I CALLED CHIEF PLT AT HOME AND TOLD HIM WHAT HAPPENED. HE AGREED THAT IT WAS A BIG PROBLEM AND WE SET A TIME TO DISCUSS IT BY PHONE IN THE MORNING. THE CHIEF PLT ASKED ME IF I WANTED TO FINISH SHIFT WITH THIS CAPT. (IT'S A 2 DAY TRIP); OR IF I WANTED TO BE PULLED OFF THE LINE WITH HIM. (CHIEF PLT DIDN'T MEAN THIS AS A THREAT; THOSE ARE THE 2 OPTIONS. BOTH HE AND THE COMPANY ARE TO BE COMMENDED ON HOW THEY ARE HANDLING THIS MATTER). I TOLD THE CHIEF PLT I DIDN'T WANT TO FLY TRIPS WITH THIS GUY SO THEY PULLED US OFF SHIFT. WE HAD A MEETING THE SAME DAY. (CHIEF PLT; CAPT AND MYSELF). THE CAPT ADMITTED TO SHOOTING THE APCH EVEN THOUGH I SAID NO. WE DIDN'T DISCUSS HOW BAD THE REST OF THE FLT WENT BECAUSE THE CHIEF PLT AND COMPANY ARE SHIELDING ME BY SAYING THE COMPETITION TURNED US IN. CAPT HAS BEEN PULLED OFF THE LINE FOR RETRAINING; CHKRIDES AND PROBATION. I THINK THAT CRM PROGRAMS COULD BE ENHANCED IF THEY CONTAINED A CHKLIST OR PROC FOR FO'S TO RUN THROUGH IN THEIR MINDS SO THAT AS BAD SITUATIONS DEVELOP; THE FO REACTS WITH AN APPROPRIATE RESPONSE. AT WHAT POINT DO YOU QUESTION THE CAPT; WHEN DO YOU START TELLING HIM; WHEN DO YOU TAKE THE ACFT AWAY FROM HIM?