A NO CONFLICT RWY INCURSION EXECUTED BY A G2 CPR FLC ON RWY 33R; AT BWI; MD.

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I CALLED THE GND CTLR FROM THE FBO RAMP; POS #1; VERY CLOSE TO THE TXWY L AND RWY 33R. THE FIRST XMISSION FROM GND CTL WAS VERY GARBLED. ALL SUBSEQUENT XMISSIONS WERE CLR. WE WERE ASKED IF WE COULD MEET THE NOISE RESTRS FOR RWY 33R AFTER WE WERE CLRED TO TAXI. WE TOLD THE CTLR THAT WE COULD NOT; AND WOULD REQUIRE RWY 33L. I UNDERSTOOD THAT SHE GAVE US TXWY Q AND HOLD SHORT OF RWY 22; THEN CHANGED TO TXWY P (IN THE OPPOSITE DIRECTION). WE COULD NOT TURN 180 DEGS ON TXWY Q; SO WE VISUALLY CLRED RWY 33R; CROSSED IT AT TXWY M; AND HELD SHORT OF RWY 22. THAT IS WHEN WE WERE TOLD TO PULL OVER AND GIVE OUR TELEPHONE NUMBER TO ATC; AND THAT WE SHOULD NOT HAVE CROSSED RWY 33R. SUPPLEMENTAL INFO FROM ACN 563121: THE GND CTLR TOLD US TO TURN L AS SOON AS WE STARTED MOVING ONTO TXWY Q. WE WERE HAVING A HARD TIME UNDERSTANDING HER. SHE WAS GARBLED AND WAS SPEAKING SOMEWHAT FAST. THE CTLR THEN TOLD US TO CHANGE OUR TAXI INSTRUCTIONS AFTER WE HAD STARTED DOWN THE TXWY SHE GAVE US (TXWY Q). MYSELF AND THE OTHER PLT THOUGHT SHE SAID TURN OPPOSITE DIRECTION AND TAKE TXWY K AND HOLD SHORT OF RWY 22. WHICH; IF THAT WAS THE CASE; WE COULD CROSS RWY 33R.