ATX C207 INVOLVED IN NMAC WITH ANOTHER ACFT DEPARTING ANOTHER RWY WHILE IN AMR CLASS D AIRSPACE. 3 OTHER ACFT INVOLVED IN INCIDENT.

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MY ACFT IS A C207. CALL SIGN USED IN COM WITH MERRILL TWR; ATX X. AT XA55; ATX X WAS CLRED TO TAKE OFF RWY 6 ON SHIP CREEK DEP; WHICH IS A L DOWNWIND DEP. THE PRECEDING 3 DEPS OFF RWY 6 WERE ALSO ON A SHIP CREEK DEP. TO THE BEST OF MY RECOLLECTION; THEY WERE A PIPER SUPER CUB (ACFT V); ANOTHER COMPANY ATX Y C207; MY C207 (ATX X); A C150 (ACFT W); AND ANOTHER ATX ACFT. RWY 6 WAS AT THE TIME THE ACTIVE RWY FOR TOUCH-AND-GO TFC. AS I WAS TURNING FROM XWIND TO DOWNWIND; MERRILL TWR CLRED ACFT Z INTO POS FOR TKOF ON RWY 33. AS I COMPLETED MY TURN AND WAS ON DOWNWIND LEVEL AT 600 FT MSL; TWR CLRED THE ACFT ON RWY 33 FOR TKOF; WITH A CITY HIGH DEP. (NOTE: CITY HIGH DEP IS R-HAND TFC WHICH CAUSES A DIRECT CONFLICT WITH TFC IN THE RWY 6/24 PATTERN.) ON DOWNWIND AND LEVEL AT 600 FT MSL; TWR ASKED IF I SAW THE DEPARTING TFC OFF RWY 33. I ACKNOWLEDGED THAT I DID SEE THE TFC. TWR ASKED THE DEPARTING RWY 33 TFC IT IS HAD OR SAW THE TFC. THE DEPARTING ACFT ADVISED HE HAD THE TFC. (AS THE TWR HAD JUST FINISHED TALKING TO ACFT V; I PRESUME IT'S ACFT V WHOM THE DEPARTING RWY 33 ACFT SAW.) THE TWR TAPES WILL PROBABLY REVEAL AT THE TIME OF THE INCIDENT THE TWR HAD 8 OR SO ACFT AIRBORNE IN ITS CLASS D AIRSPACE; SOME OF WHICH WERE IN THE RWY 6R TOUCH-AND-GO PATTERN; AS WELL AS PREPARING TO LAUNCH ANOTHER ACFT OFF RWY 33. AT THE TIME THE DEPARTING RWY 33 ACFT Z ACKNOWLEDGED IT SAW THE TFC; IT WAS NBOUND AND AT ATX Y'S 10 O'CLOCK POS AND LOWER THAN ATX X; WHICH WAS WBOUND LEVEL AT 600 FT MSL. AT ABOUT THE SAME TIME AS THE DEPARTING RWY 33 ACFT ACKNOWLEDGED IT HAD TFC; IT STARTED A CLBING R TURN. WHEN IT HAD TURNED ABOUT 20 OR MAYBE 30N DEGS OR SO; I AM SURE HE SAW ATX X FOR THE FIRST TIME AS IT; AT THAT POINT; INCREASED HIS BANK TO 60 DEGS OR MORE TO AVOID A COLLISION WITH ATX X. THE DEPARTING RWY 33 TFC PASSED WITHIN 150 FT MAX OF ATX X AT THE SAME ALT 600 FT MSL. THE TWR DID NOT CONVEY TO THE DEPARTING RWY 33 TFC THE NUMBER OF ACFT ON THE RWY 6 R DOWNWIND; WHICH WERE 4. THE TWR DID NOT MAKE SUCH WHICH OF THE 4 ACFT MAKING A R DOWNWIND RWY 6 DEP THE DEPARTING RWY 33 ACFT SAW. THE LOCATION OF VARIOUS ACFT ON THE RWY 6 R DOWNWIND DEP; AT THE TIME THE RWY 33 WAS ROLLING ON THE RWY AND LIFTOFF; WAS I BELIEVE AS FOLLOWAS: ACFT W; THE SECOND OF THE ORIGINAL 4 ACFT; HAD PASSED THE PIPER CUB (ACFT V) ON DOWNWIND AND WAS NOW THE LEAD ACFT AND WAS 1 MI OR SO W OF THE DEP CORRIDOR OF RWY 33. THE PIPER CUB WAS JUST XING OR HAD JUST CROSSED THE DEP CORRIDOR OF RWY 33 AT 600 FT MSL. ACFT W HAD A VISUAL CONTACT WITH THE PIPER CUB AND OVERTOOK AND PASSED THE PIPER CUB JUST PRIOR TO LEAVING THE MERRILL FIELD CLASS D AIRSPACE. THE C150 WAS I WOULD ESTIMATE AT ABOUT 1000 FT MSL IN A HARD CLB; PROBABLY PLANNING ON XING KNIK ARM AT 2000 FT OR ABOVE PER FAR PART 93. ATX Y WAS OR HAD JUST PASSED UNDER THE C150 AT 600 FT MSL. IT IS MY BELIEF THAT THE DEPARTING RWY 33 TFC; WHEN ADVISING IT HAD THE TFC; SAW EITHER THE PIPER CUB; OR MORE LIKELY THE C150 ACFT W; WHICH WAS PROBABLY RIGHT ABOVE AND 400-500 FT HIGHER THAN ACFT V. IF THE ACFT HE SAW WAS THE C150; THEN THE FACT THE DEPARTING RWY 33 TFC MADE A CLBING R TURN MAKES SENSE AS HE COULD SEE THAT ACFT WAS ON A COURSE WELL ABOVE THE COURSE THE RWY 33 TFC WOULD TAKE. THEREFORE; NO CONFLICT. ACFT V WAS PROBABLY RIGHT BELOW THE C150; WITH HIS ATTN FIXED ON THE C150; THE RWY 33 TFC DID NOT SEE ATX X TILL WELL INTO ITS CLBING R-HAND TURN. THIS IS AT LEAST THE 4TH NMAC I HAVE ENCOUNTERED WHILE MAKING A RWY 5 SHIP CREEK DEP; AS A RESULT OF TWR LAUNCHING A CITY HIGH DEP OFF RWY 33 BEFORE THE RWY 6 DOWNWIND TFC HAS PASSED THE RWY 33 DEP CORRIDOR. ALL THE NMAC'S REFERRED TO ABOVE WERE ENCOUNTERED WHILE OPERATING A COMMERCIAL ACFT WITH PAX AND/OR CARGO ABOARD. I AND OTHERS OVER THE YEARS HAVE REQUESTED THE FAA NOT GRANT A CITY HIGH DEP OFF OF RWY 33 WHEN THERE IS TFC IN THE RWY 6 TFC PATTERN. IN FACT; I HAD A MEETING WITH THE ASSISTANT AIR TFC MGR AT ANC TWR ON THIS INCIDENT AND ADVISED HIM THAT A CITY HIGH DEP OFF OF RWY 33 I CONSIDERED TO BE UNSAFE AS WELL AS SOME OTHER FAA PROCS.