Narrative:

Aircraft B757 (air carrier X) on final approach to arrival runway. Departure, an A300, on parallel departure runway. I cleared A300 (air carrier Y) for takeoff. After transmission, arriving B757 advises on missed approach. Departure is on 100 degree heading. I advise arriving aircraft to turn right heading 130 degrees and maintain 2000 ft. Departure traffic is within main bang. I am unable to see either out window visually. The departure blip shows up on radar at 1300 ft. The arriving aircraft now on a miss is slow turning at 1700 ft. I advise departure to maintain 1300 ft. He advises at 1500 ft. I advise aircraft to maintain 1500 ft and turn left heading 40 degrees to avoid arriving aircraft. In my opinion, given the low visibility the arriving aircraft should have started the turn right away. However, I feel the aircraft might not have realized the severity of the situation because I wasn't aware of the departure's position, and I didn't immediately advise that there was an airborne departure so as to stress the importance that the arrival start his turn expeditiously.

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Original NASA ASRS Text

Title: LCL CTLR CLRS AN ACR FOR TKOF DURING LOW VISIBILITY CONDITIONS WITH AN ACR ON FINAL APCH. THE ARRIVING ACR MAKE A MISSED APCH AND CONFLICTS WITH THE DEP RESULTING IN LTSS.

Narrative: ACFT B757 (ACR X) ON FINAL APCH TO ARR RWY. DEP, AN A300, ON PARALLEL DEP RWY. I CLRED A300 (ACR Y) FOR TKOF. AFTER XMISSION, ARRIVING B757 ADVISES ON MISSED APCH. DEP IS ON 100 DEG HDG. I ADVISE ARRIVING ACFT TO TURN R HDG 130 DEGS AND MAINTAIN 2000 FT. DEP TFC IS WITHIN MAIN BANG. I AM UNABLE TO SEE EITHER OUT WINDOW VISUALLY. THE DEP BLIP SHOWS UP ON RADAR AT 1300 FT. THE ARRIVING ACFT NOW ON A MISS IS SLOW TURNING AT 1700 FT. I ADVISE DEP TO MAINTAIN 1300 FT. HE ADVISES AT 1500 FT. I ADVISE ACFT TO MAINTAIN 1500 FT AND TURN L HDG 40 DEGS TO AVOID ARRIVING ACFT. IN MY OPINION, GIVEN THE LOW VISIBILITY THE ARRIVING ACFT SHOULD HAVE STARTED THE TURN RIGHT AWAY. HOWEVER, I FEEL THE ACFT MIGHT NOT HAVE REALIZED THE SEVERITY OF THE SIT BECAUSE I WASN'T AWARE OF THE DEP'S POS, AND I DIDN'T IMMEDIATELY ADVISE THAT THERE WAS AN AIRBORNE DEP SO AS TO STRESS THE IMPORTANCE THAT THE ARR START HIS TURN EXPEDITIOUSLY.

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.