PREMATURE RELEASE OF SKYDIVERS FROM A SHORTS SC7 WHOSE 'LOAD' FALLS ONE QUARTER MI IN FRONT AND ABOVE A BONANZA TRANSITING THE CLASS E AIRSPACE NEAR E60; AZ.

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AFTER DROPPING SKYDIVERS; I CALLED ZAB IN THE DSCNT AND HE RPTED TFC 1/4 MI E OF THE ARPT EBOUND. A DISCUSSION FOLLOWED AFTER THE PLT OF THE EBOUND BONANZA RPTED SKYDIVERS ABOVE HIS ALT; 1/4 MI AT HIS 12 O'CLOCK POS. ZAB QUESTIONED WHETHER I HAD HEARD HIS TFC RPTS. I REPLIED I HAD OVERHEARD HIM WORKING TFC WITH ANOTHER JUMP ACFT. ZAB STATED THAT HE CALLED BOTH JUMP ACFT. I NEVER REPLIED TO ANY TFC RPT AND ONLY OVERHEARD CONVERSATION THAT I BELIEVED SPECIFIC TO THE OTHER JUMP ACFT'S POS. ZAB DID NOT RPT ANY SPECIFIC TFC TO ME WHEN I MADE MY 2 MIN CALL. REMEDY: RESTRICT AIRSPACE AROUND INTENSE ACTIVITY DROP ZONES IN THE INTEREST OF PUBLIC SAFETY. REQUIRE READBACK TO VERIFY WHO IS ACTUALLY PARTICIPATING IN YOUR CONVERSATION. I BELIEVE THIS IS ALREADY IN PLACE. I'M NOT TRYING TO POINT A FINGER AT A CTLR OR ANOTHER PLT HERE. I BELIEVE ALL PARTIES INVOLVED SHARE SOME PERCENTAGE OF RESPONSIBILITY. THE POINT IS: PLTS AND CTLRS ARE PEOPLE WHO DEAL WITH VARIABLE WORKLOADS. HIGH WORKLOAD AND DIVISION OF ATTN SHOULD NOT SUBJECT LIFE AND PROPERTY TO RISK.