A BE90 PLT IS GRANTED STRAIGHT-IN APCH TO RWY 13 BY APCH. RWY 5 IS IN USE AT THE ARPT. ON SWITCHING OVER TO TWR; LNDG CLRNC IS WITHHELD BY TWR UNTIL ALMOST TOUCHDOWN. THE TWR CTLR WAS APPARENTLY EXPECTING THE BE90 TO LAND ON RWY 5 AND MUST HAVE BEEN LOOKING IN THAT DIRECTION FOR THE ACFT.

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APCHING FROM THE NW AND WORKING APCH CTL. THE WX WAS CLR BELOW 12000 FT; VISIBILITY WAS 10 MI AND WIND WAS 100 DEGS AT 5 KTS. RWY 5 WAS CURRENTLY THE ACTIVE AND TFC WAS USING SAME. WE REQUESTED RWY 13 FROM APCH FOR EXPEDIENCE AS WE WERE NW AND ABLE TO DO A STRAIGHT-IN APCH. APCH ADVISED US TO STAND BY. MOMENTS LATER; APCH REPLIED; 'CLRED DIRECT TO THE ARPT FOR THE RWY 13 VISUAL AND THIS SHOULD PUT YOU ON A STRAIGHT-IN FOR RWY 13.' WE ENTERED; 'DIRECT' ON THE GPS; AND THE HDG CAME UP 127 DEGS. APCH THEN ADVISED US TO CALL THE TWR. I THEN CALLED THE TWR AND ADVISED WE WERE ON A 'VISUAL' BUT I DID NOT SPECIFY THE RWY. TFC WAS USING RWY 5. WE SPACED OURSELVES ON RWY 13 TO LAND AFTER THE LNDG TFC ON RWY 5 ROLLED THROUGH RWY 13. NO LNDG CLRNC HAD BEEN GIVEN YET. WE WERE GETTING CLOSER TO RWY 13 AND I ASKED IF WE WERE CLRED TO LAND. NO REPLY FROM THE TWR. AS WE WERE OVER THE NUMBERS; I AGAIN ASKED THE TWR IF WE WERE CLRED TO LAND. FINALLY; TWR RESPONDED; 'CLRED TO LAND ON RWY 5.' I IMMEDIATELY ADVISED TWR THAT WE WERE LNDG ON RWY 13. AT THIS POINT WE TOUCHED DOWN ON RWY 13. TWR WAS TOTALLY UNAWARE OF OUR PRESENCE UNTIL TOUCHDOWN. AFTER TOUCHDOWN; TWR QUESTIONED WHO HAD AUTH THE APCH TO RWY 13. I REPLIED THAT APCH HAD AUTH THE VISUAL APCH. I APOLOGIZED FOR ANY PROB THAT WE MAY HAVE CAUSED AND ASKED IF THERE WERE ANY PROBS FOR THEM. TWR ADVISED THAT THERE WERE NO PROBS. THE WAY I UNDERSTAND THE PROC FOR LNDG IS THAT WHEN A REQUEST IS MADE FOR A NON ACTIVE RWY; THE APCH COORDINATES WITH THE TWR CAB AND GETS AUTH TO CLR THE ACFT TO USE THE REQUESTED RWY. THE SIMPLEST SOLUTION FOR THIS SIT WOULD BE FOR AN ACFT THAT IS CLRED ON APCH FROM APCH TO A NON ACTIVE RWY TO CALL THE TWR AND STATE FOR EXAMPLE; 'KING AIR XXX ON VISUAL TO RWY VV.'