INBOUND ACFT PLT VOICES CONCERN OVER THE NEWLY ESTABLISHED DROP AREA FOR PARACHUTE ACTIVITY 3 TO 4 NM E AND ON CTRLINE OF RWY 26R AT SDM; CA.

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APCHING BROWN FIELD (SDM) IN A JET; WE WERE ADVISED OF THE 3 PARACHUTE ZONES JUST E OF THE FIELD; AT LEAST ONE BEING 'HOT.' AT 5 MILES E WE WENT A LITTLE S OF THE CTRLINE OF RWY 26R; KNOWING OR ASSUMING THAT THE ONE S OF THE CTRLINE WOULD BE COLD (IT'S MILITARY AND NOT USED MUCH); BUT WE REALLY DID NOT KNOW FOR SURE. AT 3.5 MILES WE CORRECTED BACK TO THE CTRLINE AND NOTICED THE TWIN OTTER JUMP PLANE ABOVE US. THE TWR TREATS THESE JUMP AREAS AS THOUGH THEY ARE RESTR AREAS BUT THEY ARE NOT. GETTING IN AND OUT OF BROWN TO THE E SAFELY IS NOW IMPOSSIBLE. THE 3RD JUMP ZONE IS N OF THE CTRLINE. RWY 26R IS THE MAIN RWY USED BY TRANSIENTS JETS. IF WE HAVE A MIDAIR BETWEEN A JUMPER AND AN AIR PLANE WOULD THEY RECOGNIZE THE DANGER OF THIS SIT. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: PLT IS VERY CONCERNED WITH THIS NEW PROC. THE AFD INDICATED DROP ACTIVITY BUT THE ONE ON THE CTRLINE OF RWY 26R IS NEWLY ESTABLISHED WITHIN THE LAST 6 WEEKS; THE OTHER TWO HAVING BEEN WELL ESTABLISHED PRIOR TO THAT. A LEASE OPERATOR HAS ACQUIRED RENTAL RIGHTS AT THE ARPT AND LAND RIGHTS 3 MILES E FOR DROP RECOVERY EFFORTS. THE CLASS D AREA IS NOT 5 MILES OUT; BUT 3 NM OUT AT SDM. IT APPEARS TWR IS ACTING LIKE THE CTRLINE OF RWY 26R IS A PROHIBITED AREA AND DOES NOT COORD WELL WITH INBOUND ACFT; IE; NOT STOPPING THE PARACHUTE ACTIVITY DURING OTHER ACFT APCH PERIODS. TWR SIMPLY ADVISES THAT JUMP ZONE IS 'HOT.' RPTR IS CONCERNED THAT TRANSIENT ACFT MIGHT GET IN TROUBLE WITH PROC. HE IS LCL AND KNOWS THE AREA WELL; ALTHOUGH HE ADMITS HE CUT BACK TO CTRLINE TOO SOON. THE JUMP ACFT WAS ABOVE HIM; HE DID NOT KNOW IF IT WAS CLBING OR IN A DESCENT. HE DID NOT HEAR OR SEE ANYTHING THAT INDICATED JUMPERS WERE AWAY. THE JUMP ACFT CLB TO ABOUT 12000 FT.