ZMA CTLR DESCRIBED OPERROR WHILE CONDUCTING OJT WHEN RADAR ASSOC CTLR FAILED TO COORD CONFLICTING WX DIVERT ACFT ENTERING AIRSPACE.

Narrative

WHILE TRAINING ANOTHER SPECIALIST ON THE SECTOR 21 RADAR POS MY TRAINEE ISSUED CTL INSTRUCTION TO ACFT X TO DSND FROM 140 TO 080. SHORTLY AFTER THE CLRNC WAS ISSUED THE CONFLICT ALERT ACTIVATED WITH THE DATA BLOCK FOR ACFT Y APPEARING ON OUR SCOPE. THE DATA BLOCKS WERE INITIALLY OVERLAPPED AND I COULD NOT IMMEDIATELY ASCERTAIN THE ACFT Y ALT. AFTER MOVING THE DATA BLOCK OF ACFT X WHOSE LAST KNOWN ALT WAS APPROX 132 I ISSUED INSTRUCTIONS FOR ACFT X TO EXPEDITE HIS DSCNT THROUGH 120. THE D-SIDE CTLR HAD RECEIVED A POINTOUT ON ACFT Y DEVIATING INTO MY SECTOR FOR WX BUT SUBSEQUENTLY DROPPED THE DATA BLOCK 45 SECONDS AFTER APPROVING THE POINTOUT AND NEVER CONFERRED WITH MY TRAINEE OR I ABOUT THE ACFT AND ITS INTENTIONS. SUBSEQUENTLY THE ACFT ENDED UP FLYING THROUGH MY SECTOR AS A LIMITED DATA BLOCK ONLY AND I WAS NEVER AWARE OF IT UNTIL THE CONFLICT ALERT ACTIVATED. TRAINING AND WX WERE DEFINITELY A FACTOR BY CAUSING POSSIBLE OBSCUREMENT OF THE LIMITED DATA BLOCK AND DISTRS WHILE DISCUSSING TRAINING SCENARIOS.