TKOF ON OCCUPIED RWY -- ACR TAKES OFF WHILE A GLIDER IS ON THE OPPOSITE END OF THE RWY.

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THE OCCURRENCE: AS THE CAPT TAXIED OUT FOR TKOF WE CROSSED RWY 08 AND SAW A SAILPLANE AND TRUCK AT THE END OF THE RWY (THE SAILPLANE WAS ON THE RWY AND THE TRUCK WAS OFF THE RWY). THE CAPT (PF) DECIDED TO TKOF ON RWY 32L. TO DO THIS YOU MUST BACK TAXI. AS WE TURNED TO BACK TAXI ON RWY 32L IT LOOKED AS IF THE SAILPLANE WAS AT THE END OF RWY 14R (RWYS 14R AND 08 ARE CONNECTED AT THE END). I TOLD THE CAPT I THOUGHT THE SAILPLANE WAS ON RWY 14R. THE CAPT THEN TRIED TO CONTACT THE SAILPLANE ON 122.8 TO SEE IF THEY WERE ON THAT FREQ SINCE WE GOT NO REPLY ON THE CTAF 122.95. WE GOT A RESPONSE. THE CAPT THEN ASKED WHAT THEIR INTENTIONS WERE. WE DID NOT GET ANY RESPONSE TO THE CAPT'S QUESTION. THE CAPT CONTINUED TO BACK TAXI FOR TKOF ON RWY 32L. HE TURNED THE ACFT AROUND FOR TKOF AND PROCEEDED TO TKOF. I TOLD THE CAPT I THOUGHT THE SAILPLANE WAS AT THE END OF THE RWY WE WERE ON AND USING; AND SAID 'I WOULDN'T DO THIS IF I WERE YOU!' BY THAT TIME HE HAD THE PWR UP AND SOME AIRSPD SO I DID NOT THINK IT WOULD BE WISE FOR ME TO TAKE THE CTLS FROM HIM. I THOUGHT THAT WOULD BE MORE DANGEROUS THAN THE ACTUAL OCCURRENCE. THE CAPT THINKS THEY WERE AT THE END OF RWY 08 (WHICH CONNECTS WITH RWY 14R). I TOLD HIM I DIDN'T THINK SO. THE ACFT ON TKOF SEEMED TO HAVE CLRED WELL ABOVE THE SAILPLANE. CONTRIBUTING FACTORS: POOR PLT JUDGEMENT ON THE CAPT'S PART! POOR RADIO COMS; THE SAILPLANE WAS ON THE WRONG FREQ (122.8) THE CORRECT CTAF WAS 122.95. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE FO WAS FLYING A BEECH 1900 WHEN THE CREW FLEW OVER THE GLIDER ON THE FAR END OF THE RWY. HE SAID THAT IN THE FUTURE HE WOULD BE MUCH STRONGER PERSON IN A CONFLICT SUCH AS THIS. THE COMPANY HAS SPOKEN TO THE FLC ABOUT THE INCIDENT AND SEEMED SATISFIED. THE FAA DID NOT GET INVOLVED. THE GLIDER OPERATOR NO LONGER FLIES OUT OF THIS ARPT; DUE IN PART; ACCORDING TO THIS RPTR; TO A NUMBER OF CONFLICTS WITH OTHER OPS AT THE FIELD.