APCH TO BELOW MINIMUMS.

Narrative

ARRIVING TO EXECUTE THE APCH AT MARSHALL; WE HAD DSNDED FROM FL430. APPROX 50 NM OUT; WE TOLD THE CTLR WE EXPECTED TO DO THE VOR 12 APCH AT MARSHALL. HE SAID 'ROGER' AND GAVE US THE AWOS WX AS 200 FT AND 1 1/2 MI VISIBILITY. HE SAID 'BE ADVISED THAT IS A 600 FT APCH.' WE (MY COPLT) SAID 'OUR APCH PLATE SHOWS 381 FT FOR THE STRAIGHT-IN VOR RWY 12 WITH DME AND LCL ALTIMETER;' ALL OF WHICH WE HAD. HE DISAGREED AND HANDED US OFF TO THE NEXT CTLR. SIGNING ON WITH THE NEXT CTLR; WE RESTATED OUR INTENT TO EXECUTE THE STRAIGHT-IN VOR RWY 12 APCH. HE REPEATED WHAT THE PREVIOUS CTLR HAD SAID ABOUT THE MINIMUMS. AND WE SAID WE HAD THE APCH PLATE AND IT WAS 381 FT AND 3/4 MI. IT WENT BACK AND FORTH A COUPLE TIMES ABOUT MINIMUMS. IT WAS NOT UNFRIENDLY OR HEATED BUT HE STARTED USING 'SIR' A LOT (BAD SIGN). IT WAS OBVIOUS NOBODY WAS GOING TO GIVE. WE SAID WE WOULD LIKE TO TRY THE APCH AND; IF WE MISSED; WE WOULD GO TO MSP. HE CLRED US FOR THE APCH. WE DID IT TO 381 FT AGL AS PER APCH PLATE AND MADE GND CONTACT ABOUT 3 MI OUT. WE HAD THE APCH LIGHTS AT ABOUT 1 MI. WE LANDED SUCCESSFULLY. THE ONLY 600 FT 1 MI MINIMUMS AT MARSHALL ARE FOR VOR RWY 12 CIRCLE TO LAND WITH DME AND REDWOOD ALTIMETER. WHEN WE BRIEFED FOR THE FLT; THE APCH WAS NOT NOTAMED. AFTER WE LANDED; WE CHKED NOTAMS AGAIN; NOTHING. WE CALLED PRINCETON FSS THE NEXT DAY AND THEY HAD AN FDC NOTAM MAKING IT 421 FT 1 MI. LATER IN THE DAY; WE WERE FLYING AND ASKED CTR CTLR WHAT HE SHOWED FOR MINIMUMS FOR THE APCH. HE; AFTER MUCH DIGGING; SAID 421 FT 1 MI BY AMENDMENT 5A. LOTS OF CONFUSION; BUT IT'S APPARENTLY 421 FT 1 MI. SO THE ORIGINAL CTLRS AND WE WERE ALL WRONG.