RPTED XING TFC SIT INVOLVING THE SECOND OF A FLT OF 2 VFR MIL F16'S DEPARTING RWY 10 TURNING TO A 350 DEG HDG ON A CONVERGING COURSE WITH AN ACR B737 DEPARTING RWY 8. BOTH ACFT HAD THE OTHER IN SIGHT AND AVOIDED EACH OTHER.

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I WAS WORKING THE LCL POS IN THE SJU TWR. THE CAB COORDINATOR POS WAS NOT MANNED; AND A FLOW; TO CALL DEP CTL ON ALL IFR DEPS; WAS ESTABLISHED DUE TO D-BRITE OTS. AT APPROX XX37Z ACFT #1 (VFR) WAS TAXIED INTO POS AND HOLD; AWAITING ARR TFC TO CLR RWY 10. CALLED DEP CTL FOR RELEASE ON ACFT #2; WHICH DEP CTL RELEASED. AN ACR WAS INBOUND FOR RWY 10; STARTING R BASE. LCL CTLR ASKED ACFT #1 HOW LONG THEY WILL STAY ON RWY 10. RESPONSE WAS 'MINIMUM TIME; READY FOR TKOF.' AS PER LOA WITH SJU CERAP; SWITCH ACFT #1 TO DEP CTL FREQ AND CLRED HIM FOR TKOF. PUT ACFT #2 ON RWY 8 ON POS AND HOLD. CHANGE ACR TO LAND ON RWY 8. FIRST F16 TOOK OFF ON A 350 DEG HDG; XING RWY 8 NBOUND. CLRED ACFT #2 FOR TKOF DUE TO PROX OF THE ACR. NOTICED SECOND F16 STILL ROLLING OFF ON RWY 10. CLRED ACFT #2 TO ABORT TKOF AND THEN; ASK IF THEY COULD STOP. ACFT #2 ADVISED UNABLE TO STOP. ACFT #2 WAS CLRED TO A 100 DEG HDG; TO WHICH FLC STATED UNABLE; AND FLEW RWY HDG. FIRST F16 HAS ALREADY CROSSED NBOUND RWY 8. SECOND F16 NOTICED TFC DEPARTING RWY 8 AND CLBED STRAIGHT UP AND THEN BANKED NBOUND. ACFT #2 STAYED LOW; AND ADVISED THAT THEY HAD F16 IN SIGHT. ACFT #2 WAS TURNED NBOUND AND SWITCHED. POOR PLANNING; BLOCKED BOTH RWYS. NEVER BLOCK BOTH RWYS. I COULD TAKE THE ACR NBOUND AND RESEQUENCE HIM FOR ANOTHER APCH. SECOND OPTION; KEEP ACFT #2 ON POS AND HOLD; AND GIVE THE ACR A GAR. THIRD OPTION; PUT THE ACR ON L 360 DEG TURN FOR SPACING AND LAND ON RWY 10; KEEPING ACFT #2 ON HOLD.