START SECOND APCH WX BELOW MINIMUMS.

Narrative

I WAS FLYING THE SECOND LEG OF MY NORMAL PART 135 RUN; RETURNING TO CRG FROM ORL. WX WAS VFR ENRTE. JAX APCH TOLD ME TO EXPECT THE ILS 32 INTO CRG AND TO VERIFY I HAD THE ATIS INFO. I DO NOT RECALL THE ATIS LETTER CODE; BUT I BELIEVE THE VISIBILITY WAS BETTER THAN THE REQUIRED 3/4 MI; ALTHOUGH FOG WAS RPTED; SKY OBSCURED. I WAS VECTORED ONTO THE APCH AND PASSED OFF TO CRG TWR. TWR STATED TO ME; AFTER I WAS INSIDE THE FAF; THAT TWR VISIBILITY WAS 1/4 MI. I CONTINUED THE APCH. UPON ARR AT DECISION HT; I WENT MISSED APCH. JUST AS I WENT MISSED I SAW THE RWY AND ARPT AND WAS DISAPPOINTED THAT I HAD TO GO MISSED; SO I DECIDED TO TRY IT AGAIN. I RECEIVED VECTORS FOR ANOTHER ILS. JUST BEFORE FINAL VECTOR I WAS ADVISED THAT CRG WAS NOW RPTING SKY OBSCURED; VISIBILITY 1/4 MI. I QUERIED ATC; 'IF CRG IS NOW RPTING ONLY 1/4 MI VISIBILITY; CAN I LEGALLY SHOOT THE APCH?' THE CTLR ANSWERED THAT HE DID NOT KNOW WHAT MY OPERATING RULES WERE. SO; THERE I WAS; TRYING TO REMEMBER THE WORDING OF THE FAR. (IT MIGHT BE IMPORTANT TO NOTE THAT THIS WAS MY 7TH DAY AS A PART 135 PLT.) I COULD NOT REMEMBER IF I WAS ALLOWED TO FLY THE APCH OR NOT. I DID KNOW THAT I NEEDED THE REQUIRED VISIBILITY TO LAND. BUT WAS IT GND OR FLT VISIBILITY? I HAD BEEN TAUGHT THAT A GOOD RULE OF THUMB IS THAT IF YOU CAN SEE THE RWY AT YOUR MISSED APCH POINT; THEN YOU HAVE THE REQUIRED VISIBILITY. ANYWAY; ALL THIS WAS GOING THROUGH MY HEAD AS I GOT MY FINAL VECTOR ONTO THE APCH. I WASN'T REALLY SURE WHAT I SHOULD DO; AND I WAS NERVOUS ABOUT GETTING MY CARGO IN ON TIME. I WAS FEARFUL OF GETTING YELLED AT IF I HAD TO HOLD. SO; I DECIDED TO SHOOT THE APCH. I FIGURED IF I COULD SAFELY LAND; I WOULD. IF I COULD NOT; I WOULD GO MISSED AGAIN AND WAIT FOR THE FOG TO BURN OFF. WELL; I GOT TO DECISION HT; SAW THE RWY ENVIRONMENT AND LANDED. TWR TOLD ME TO RPT MISSED APCH OR ON THE GND. I RPTED THAT I WAS ON THE GND. THEY SAID TO TAXI TO THE RAMP AND RPT ON THE RAMP. I DID. ON THE GND I TALKED OVER WHAT HAD HAPPENED WITH SOME OF THE COMPANY PLTS. THE CONCLUSION WAS THAT I HAD LANDED ILLEGALLY SINCE RPTED VISIBILITY WAS LESS THAN REQUIRED. IN FACT; I WAS NOT LEGALLY ALLOWED TO ATTEMPT THE APCH UNLESS THE WX RPT CHANGED ONCE I WAS INSIDE THE FAF. THE MOST CONFUSING THING TO ME; INITIALLY; WAS THE FACT THAT ATC VECTORED ME ONTO THE APCH. I WAS A LITTLE UNSURE OF WHAT TO DO AND FIGURED THEY KNEW WHAT THEY WERE DOING. IF I WAS GETTING VECTORS; I MUST BE LEGAL; I THOUGHT. ONCE I KNEW THAT THEY WERE LEAVING THINGS UP TO ME I FELT EVEN MORE UNSURE AND A LITTLE UNEASY. THE FACT THAT I HAD LEARNED AS A PART 91 PLT THAT I COULD TRY ANY APCH; REGARDLESS OF VISIBILITY WAS A FACTOR. FLT VISIBILITY VERSUS GND VISIBILITY IS STILL A LITTLE CONFUSING TO ME. WHETHER OR NOT 'TWR' VISIBILITY MEANS ANYTHING OTHER THAN AN ADVISORY; I'M STILL NOT SURE ABOUT. HOWEVER; THE BOTTOM LINE IS THAT I SHOULD HAVE KNOWN THE REGS BETTER; OR EVEN HAD A COPY WITH ME. I KNOW NOW THAT TO AVOID THIS IN THE FUTURE I'LL SIMPLY COMPLY WITH THE RPTED GND VISIBILITY; IF IT'S LESS THAN REQUIRED; I'LL BE HOLDING.