INEXPERIENCED PIC AND LOW TIME FO OF CL65 FLT FAIL TO MAKE XING RESTR ON DSCNT TO DEST.

Narrative

ON A DSCNT INTO THE TERMINAL AREA FROM CRUISE ALT; WE WERE CLRED TO CROSS 50 MI N OF SPARTENVILLE AT 15000 FT. AS WE STARTED THE DSCNT; I LEFT THE FREQ TO GET THE ATIS AND CALL IN RANGE. THE FO LATER TOLD ME THAT WHEN I WAS OFF FREQ; ATC ASKED HIM IF WE COULD MAKE THE RESTR. HE REPLIED AFFIRMATIVE. WHEN I WAS BACK ON FREQ AND DSNDING THROUGH FL180; ATC ASKED WHAT WE WERE SHOWING FOR A DME FROM THE GVE VOR; AND I REPLIED 49 DME. WE WERE 80 NM N OF THE ARPT. IT WAS AT THAT TIME THAT BOTH PLTS REALIZED THAT THE RESTR WAS FOR 50 DME N OF THE VOR; AND NOT THE ARPT. I NOTIFIED ATC THAT WE WERE CONTINUING OUR DSCNT; AND HE REPLIED 'OK.' THE PRIMARY REASON FOR THIS PROB COULD BE ATTRIBUTED TO INEXPERIENCE. NEITHER CREW MEMBER HAD BEEN INTO GSP. THE FO HAD LESS THAN 500 HRS IN A TURBOJET; AND ROUGHLY 700 HRS OF TOTAL TIME. THE CAPT HAD ONLY 125 HRS IN A TURBOJET; AND LESS THAN 100 HRS OF PART 121 PIC. THE PLT CONTRACT BTWN THE UNION AND MGMNT DOES NOT ALLOW PLTS TO TRANSITION TO TURBOJET ACFT IN THE R SEAT. THIS MEANS THAT MANY TURBOJET PIC'S START AS CAPT WITH ZERO TURBOJET EXPERIENCE; AND OFTEN ARE PAIRED WITH NEW HIRE FO'S. THE ONLY FAR REQUIREMENT IS THAT AT LEAST 1 CREW MEMBER HAVE AT LEAST 75 HRS IN TYPE. I ALSO HAD ONLY 125 HRS AS AN ATP. CONSIDERATION BE GIVEN TO A REG REQUIRING TURBOJET PIC'S TO HAVE A MINIMUM NUMBER OF HRS IN TYPE BEFORE TRANSITIONING TO PIC.