NMAC.

Narrative

CMA WAS OPERATING ON RWY 26 WITH VFR WX AND 10 MI VISIBILITY. OXR LIES 5 MI TO THE W OF CAMARILLO. THE ILS TO OXNARD LIES TO THE S OF CAMARILLO APPROX 1 1/2 MI; AND WAS THE APCH IN USE AT THIS TIME TO OXNARD. I WAS DEPARTING CMA ON RWY 26 ON A L DOWNWIND DEP. THERE WERE A NUMBER OF ACFT IN THE PATTERN AND I WAS FOLLOWING A T-6 THAT HAD DEPARTED AHEAD OF ME AND APPEARED TO BE STAYING IN THE PATTERN. THE PATTERN HAD BEEN EXTENDED FARTHER W AND S THAN I WAS USED TO SEEING; DUE TO; I FEEL; THE NUMBER OF ACFT UTILIZING THE PATTERN. I FOLLOWED THE TRACK OF THE T-6; WHICH WAS UTILIZING THE PATTERN THAT EVERYONE ELSE WAS FLYING. AS I TURNED TO THE DOWNWIND ON MY DEP; I OBSERVED A BAE JETSTREAM ON THE ILS TO OXNARD. THE ACFT WAS TO THE L OF MY ACFT AS I WAS ON THE DOWNWIND. THIS ACFT WAS DSNDING ON THE ILS TO OXNARD. AS I PROCEEDED ON THE DOWNWIND DEP AND THE JETSTREAM DSNDED ON THE LOC; WE ENDED UP WITH VERY LITTLE SEPARATION (APPROX 200 FT VERT AND 300 FT HORIZ) BTWN THE 2 ACFT. I LEVELED OFF UPON SEEING THE JETSTREAM; I DID NOT SEE ANY DEV OR MANEUVER ON THE PART OF THE OTHER ACFT TO INDICATE THAT HE SAW ME. I CAN ONLY ASSUME THAT THE JETSTREAM WAS ON THE ILS GS; SINCE THERE WAS NO COM WITH THAT ACFT. AT THE TIME I FIRST OBSERVED THE JETSTREAM; I WAS IN THE PROCESS OF ASKING THE CMA FOR A FREQ CHANGE SO I COULD GET TA'S FROM POINT MAGU APCH. THE TWR CTLR DID REMIND ME TO USE CAUTION FOR ILS TFC INTO OXNARD. I TOLD THE CTLR THAT I HAD ILS TFC IN SIGHT. I WAS NOT ABLE TO ESTABLISH CONTACT WITH POINT MAGU UNTIL I WAS 4 MI E OF CAMARILLO DUE TO A CTLR CHANGE. THE APCH CTLR DID NOT INQUIRE AS TO MY HAVING ANY PROBS WITH OXNARD ILS TFC ON MY DEP. I DO NOT FEEL THAT THIS SHOULD BE CLASSIFIED AS A NEAR MIDAIR; BUT AS AN UNCOMFORTABLY CLOSE PASS OF 2 ACFT THAT COULD HAVE BECOME A NEAR MIDAIR IF THE SIT HAD BEEN ONLY SLIGHTLY DIFFERENT. WITH THE PATTERN EXTENDED TO THE S; IT PLACES ACFT IN THE PATTERN AT CAMARILLO CLOSER TO THE LOC; AND IN THIS CASE BEYOND IT. WITH THE PATTERN EXTENDED TO THE W; ACFT IN THE CAMARILLO PATTERN END UP GETTING LOSER TO THESE ILS ARRS SINCE THEY CONTINUE TO DSND AS THEY TRAVEL W. THERE IS NO RADAR AT CMA TWR. WITH AN ILS SO CLOSE TO THE PATTERN THERE; IT WOULD ENHANCE SAFETY TO HAVE THAT CAPABILITY FOR THE CTLRS TO POINT OUT TFC TO PEOPLE IN THEIR PATTERN. WITHOUT THIS CAPABILITY; IT WOULD BE A GOOD IDEA FOR CTLR TO SUGGEST THAT ACFT DO NOT CLB ABOVE PATTERN ALT ON DOWNWIND DEPS UNTIL AT THE E ARPT BOUNDARY. THIS WOULD ALLOW MUCH BETTER SEPARATION OF VFR AND IFR TFC AND COMPLEMENT THE SEE-AND-AVOID TECHNIQUES THAT ALL ACFT OPERATING IN THIS PRESENT ENVIRONMENT HAVE TO USE.