Narrative:

Our flight was en route tpa direct jax. Center cleared us from 8000' cruise [altitude] to 4000'. At approximately 6500', captain, who was flying, called for approach checklist. At about 6000', I felt the aircraft start to bank left as the captain pointed out the right window and said 'look at that!' as I looked out the window, I saw a navy mlt Y in our 3 O'clock, at approximately 1000', rolling hard left and descending to avoid collision. He passed behind us at a distance of approximately 500'. Our assigned heading was 360 degree in the descent. I called center to advise that we had just had an mlt Y pass very close behind us. Center said 'turn 10 degrees right and change to jax approach control 127.00'. The captain told me to specify that we had just had 'a near miss'. I said that to the center and asked him to repeat the approach frequency (127.00 is non-standard) he did not acknowledge the near miss but restated the frequency. We were both shaken up, but the approach and landing continued normally. Two of our 8 passengers commented on seeing the radical evasive maneuver of the navy aircraft. Heads-up must be religiously practiced, even during checklists and paperwork. We often see high speed maneuvering navy and air force aircraft in our vicinity throughout fl. It seems that in the jax area, we do see lots of military traffic that center and approach never mention, yet we are often advised of slow moving general aviation aircraft, which are usually no factor. This is a sort of negative conditioning process.

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Original NASA ASRS Text

Title: COMMUTER AND MLT Y NMAC NEAR JAX.

Narrative: OUR FLT WAS ENRTE TPA DIRECT JAX. CENTER CLRED US FROM 8000' CRUISE [ALT] TO 4000'. AT APPROX 6500', CAPT, WHO WAS FLYING, CALLED FOR APCH CHKLIST. AT ABOUT 6000', I FELT THE ACFT START TO BANK L AS THE CAPT POINTED OUT THE R WINDOW AND SAID 'LOOK AT THAT!' AS I LOOKED OUT THE WINDOW, I SAW A NAVY MLT Y IN OUR 3 O'CLOCK, AT APPROX 1000', ROLLING HARD L AND DSNDING TO AVOID COLLISION. HE PASSED BEHIND US AT A DISTANCE OF APPROX 500'. OUR ASSIGNED HDG WAS 360 DEG IN THE DSCNT. I CALLED CENTER TO ADVISE THAT WE HAD JUST HAD AN MLT Y PASS VERY CLOSE BEHIND US. CENTER SAID 'TURN 10 DEGS R AND CHANGE TO JAX APCH CTL 127.00'. THE CAPT TOLD ME TO SPECIFY THAT WE HAD JUST HAD 'A NEAR MISS'. I SAID THAT TO THE CENTER AND ASKED HIM TO REPEAT THE APCH FREQ (127.00 IS NON-STANDARD) HE DID NOT ACKNOWLEDGE THE NEAR MISS BUT RESTATED THE FREQ. WE WERE BOTH SHAKEN UP, BUT THE APCH AND LNDG CONTINUED NORMALLY. TWO OF OUR 8 PAXS COMMENTED ON SEEING THE RADICAL EVASIVE MANEUVER OF THE NAVY ACFT. HEADS-UP MUST BE RELIGIOUSLY PRACTICED, EVEN DURING CHKLISTS AND PAPERWORK. WE OFTEN SEE HIGH SPD MANEUVERING NAVY AND AIR FORCE ACFT IN OUR VICINITY THROUGHOUT FL. IT SEEMS THAT IN THE JAX AREA, WE DO SEE LOTS OF MIL TFC THAT CENTER AND APCH NEVER MENTION, YET WE ARE OFTEN ADVISED OF SLOW MOVING GENERAL AVIATION ACFT, WHICH ARE USUALLY NO FACTOR. THIS IS A SORT OF NEGATIVE CONDITIONING PROCESS.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.