FLC OF A CPR G-IV OVERSHOT INTERMEDIATE DSCNT ALT ON A STAR ARR DUE TO MISUNDERSTANDING OF CLRNC.

Narrative

WHILE FLYING THE MRLIN 4 ARR TO THE FXE ARPT; WE WERE GIVEN A CLRNC TO DSND TO 11000 FT AND VECTORED OFF THE ARR. THE ALT WAS READ BACK; PUT INTO THE ALERTER AND THE GULFSTREAM IV; ON AUTOPLT; CONTINUED ITS DSCNT TO THE ASSIGNED ALT AND HDG. WE WERE GIVEN A FREQ CHANGE. THE NEW CTLR ISSUED A NEW CLRNC TO INTERCEPT THE 029 DEG RADIAL OF THE VKZ VOR TO RESUME THE MRLIN 4 ARR. AS FO OF THIS TRIP OPERATING THE RADIO; I DIDN'T UNDERSTAND THE CTLR AND ASKED HIM TO READ BACK THE CLRNC; WHICH HE DID. SOMEWHERE IN THE TRANSLATION; I GOT INTO MY HEAD THAT HE SAID 260 DEG RADIAL AND READ IT BACK TO HIM THAT WAY. AFTER A COUPLE OF EXCHANGES; I REALIZED I WAS READING IT BACK WRONG; TOLD THE CTLR HE WAS RIGHT AND CORRECTED MY READBACK. A FEW MINS LATER; AS WE WERE ABOUT TO LEVEL OFF AT 11000 FT; THE CTLR CALLED AND SAID WE WERE SUPPOSED TO LEVEL AT 13000 FT. I NEVER HEARD IT NOR DID THE CAPT FLYING THE ACFT. I ASKED THE CTLR IF HE WANTED US AT 13000 FT OR 11000 FT. HE SAID TO STAY AT 11000 FT; AND WE DID. I FEEL THE 13000 FT ALT; IF GIVEN; WAS LOST IN THE CONFUSION CAUSED WHILE TRYING TO GET THE RADIAL INTERCEPT PART OF THE CLRNC CORRECT. I NEVER HEARD THE 13000 FT NOR WAS I ASKED TO READ IT BACK. AS ALWAYS; THE BEST CORRECTIVE ACTION I FEEL THAT CAN BE MADE IS TO LISTEN UP VERY CAREFULLY -- ESPECIALLY DURING THE ARR AND APCH PORTIONS OF THE FLT.